diff --git a/.docker/build b/.docker/build
index 2e74837bc..fe10625f4 100755
--- a/.docker/build
+++ b/.docker/build
@@ -7,8 +7,8 @@ readonly DOCKER=$(which docker)
 # Globals
 # PWD
 
-if [[ "$(docker images -q box_php53 2> /dev/null)" == "" ]]; then
-    $DOCKER build --platform=linux/amd64 --tag=box_php53 --file "$PWD/.docker/php53" .
+if [[ "$(docker images -q box_php725 2> /dev/null)" == "" ]]; then
+    $DOCKER build --platform=linux/amd64 --tag=box_php725 --file "$PWD/.docker/php725" .
 fi
 
 if [[ "$(docker images -q box_php81 2> /dev/null)" == "" ]]; then
diff --git a/.docker/php53 b/.docker/php53
deleted file mode 100644
index b2df7ba8e..000000000
--- a/.docker/php53
+++ /dev/null
@@ -1,4 +0,0 @@
-FROM helder/php-5.3
-
-RUN echo '' | pecl install phar; \
-    echo '' | pecl install json
diff --git a/.docker/php725 b/.docker/php725
new file mode 100644
index 000000000..2acc08764
--- /dev/null
+++ b/.docker/php725
@@ -0,0 +1 @@
+FROM php:7.2.5-alpine
diff --git a/.gitignore b/.gitignore
index a363977bf..929efe119 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,7 @@
 /fixtures/build/dir012/expected-output
 /fixtures/check-requirements/*/actual-output
 /fixtures/check-requirements/*/expected-output-*
+!/fixtures/check-requirements/*/expected-output-*-dist
 /fixtures/check-requirements/*/*.phar
 /fixtures/php-settings-checker/*
 !/fixtures/php-settings-checker/index.php
diff --git a/.requirement-checker/src/Checker.php b/.requirement-checker/src/Checker.php
index 215e40bb4..a8ec9b2dd 100644
--- a/.requirement-checker/src/Checker.php
+++ b/.requirement-checker/src/Checker.php
@@ -5,7 +5,7 @@
 final class Checker
 {
     private static $requirementsConfig;
-    public static function checkRequirements()
+    public static function checkRequirements() : bool
     {
         $requirements = self::retrieveRequirements();
         $checkPassed = $requirements->evaluateRequirements();
@@ -13,7 +13,7 @@ public static function checkRequirements()
         self::printCheck($checkPassed, new Printer($io->getVerbosity(), $io->hasColorSupport()), $requirements);
         return $checkPassed;
     }
-    public static function printCheck($checkPassed, Printer $printer, RequirementCollection $requirements)
+    public static function printCheck($checkPassed, Printer $printer, RequirementCollection $requirements) : void
     {
         if (\false === $checkPassed && IO::VERBOSITY_VERY_VERBOSE > $printer->getVerbosity()) {
             $printer->setVerbosity(IO::VERBOSITY_VERY_VERBOSE);
@@ -36,7 +36,7 @@ public static function printCheck($checkPassed, Printer $printer, RequirementCol
         } else {
             $printer->printvln('> No requirements found.', $verbosity);
         }
-        $errorMessages = array();
+        $errorMessages = [];
         foreach ($requirements->getRequirements() as $requirement) {
             if ($errorMessage = $printer->getRequirementErrorMessage($requirement)) {
                 if (IO::VERBOSITY_DEBUG === $printer->getVerbosity()) {
@@ -70,7 +70,7 @@ public static function printCheck($checkPassed, Printer $printer, RequirementCol
         }
         $printer->printvln('', $verbosity);
     }
-    private static function retrieveRequirements()
+    private static function retrieveRequirements() : RequirementCollection
     {
         if (null === self::$requirementsConfig) {
             self::$requirementsConfig = __DIR__ . '/../.requirements.php';
diff --git a/.requirement-checker/src/IO.php b/.requirement-checker/src/IO.php
index 79cff267e..d1c0fedc8 100644
--- a/.requirement-checker/src/IO.php
+++ b/.requirement-checker/src/IO.php
@@ -2,63 +2,75 @@
 
 namespace HumbugBox3160\KevinGH\RequirementChecker;
 
+use function fstat;
+use function function_exists;
+use function getenv;
+use function implode;
+use function posix_isatty;
+use function preg_match;
+use function preg_quote;
+use function sapi_windows_vt100_support;
+use function sprintf;
+use function str_replace;
+use function stream_isatty;
+use const STDOUT;
 final class IO
 {
-    const VERBOSITY_QUIET = 16;
-    const VERBOSITY_NORMAL = 32;
-    const VERBOSITY_VERBOSE = 64;
-    const VERBOSITY_VERY_VERBOSE = 128;
-    const VERBOSITY_DEBUG = 256;
+    public const VERBOSITY_QUIET = 16;
+    public const VERBOSITY_NORMAL = 32;
+    public const VERBOSITY_VERBOSE = 64;
+    public const VERBOSITY_VERY_VERBOSE = 128;
+    public const VERBOSITY_DEBUG = 256;
     private $interactive;
     private $verbosity = self::VERBOSITY_NORMAL;
     private $colorSupport;
     private $options;
     public function __construct()
     {
-        $this->options = \implode(' ', $_SERVER['argv']);
+        $this->options = implode(' ', $_SERVER['argv']);
         $shellVerbosity = $this->configureVerbosity();
         $this->interactive = $this->checkInteractivity($shellVerbosity);
         $this->colorSupport = $this->checkColorSupport();
     }
-    public function isInteractive()
+    public function isInteractive() : bool
     {
         return $this->interactive;
     }
-    public function getVerbosity()
+    public function getVerbosity() : int
     {
         return $this->verbosity;
     }
-    public function hasColorSupport()
+    public function hasColorSupport() : bool
     {
         return $this->colorSupport;
     }
-    public function hasParameter($values)
+    public function hasParameter($values) : bool
     {
         $values = (array) $values;
         foreach ($values as $value) {
-            $regexp = \sprintf('/\\s%s\\b/', \str_replace(' ', '\\s+', \preg_quote($value, '/')));
-            if (1 === \preg_match($regexp, $this->options)) {
+            $regexp = sprintf('/\\s%s\\b/', str_replace(' ', '\\s+', preg_quote($value, '/')));
+            if (1 === preg_match($regexp, $this->options)) {
                 return \true;
             }
         }
         return \false;
     }
-    private function checkInteractivity($shellVerbosity)
+    private function checkInteractivity(int $shellVerbosity) : bool
     {
         if (-1 === $shellVerbosity) {
             return \false;
         }
-        if (\true === $this->hasParameter(array('--no-interaction', '-n'))) {
+        if (\true === $this->hasParameter(['--no-interaction', '-n'])) {
             return \false;
         }
-        if (\function_exists('posix_isatty') && !@\posix_isatty(\STDOUT) && \false === \getenv('SHELL_INTERACTIVE')) {
+        if (function_exists('posix_isatty') && !@posix_isatty(STDOUT) && \false === getenv('SHELL_INTERACTIVE')) {
             return \false;
         }
         return \true;
     }
-    private function configureVerbosity()
+    private function configureVerbosity() : int
     {
-        switch ($shellVerbosity = (int) \getenv('SHELL_VERBOSITY')) {
+        switch ($shellVerbosity = (int) getenv('SHELL_VERBOSITY')) {
             case -1:
                 $this->verbosity = self::VERBOSITY_QUIET;
                 break;
@@ -75,39 +87,39 @@ private function configureVerbosity()
                 $shellVerbosity = 0;
                 break;
         }
-        if ($this->hasParameter(array('--quiet', '-q'))) {
+        if ($this->hasParameter(['--quiet', '-q'])) {
             $this->verbosity = self::VERBOSITY_QUIET;
             $shellVerbosity = -1;
-        } elseif ($this->hasParameter(array('-vvv', '--verbose=3', '--verbose 3'))) {
+        } elseif ($this->hasParameter(['-vvv', '--verbose=3', '--verbose 3'])) {
             $this->verbosity = self::VERBOSITY_DEBUG;
             $shellVerbosity = 3;
-        } elseif ($this->hasParameter(array('-vv', '--verbose=2', '--verbose 2'))) {
+        } elseif ($this->hasParameter(['-vv', '--verbose=2', '--verbose 2'])) {
             $this->verbosity = self::VERBOSITY_VERY_VERBOSE;
             $shellVerbosity = 2;
-        } elseif ($this->hasParameter(array('-v', '--verbose=1', '--verbose 1', '--verbose'))) {
+        } elseif ($this->hasParameter(['-v', '--verbose=1', '--verbose 1', '--verbose'])) {
             $this->verbosity = self::VERBOSITY_VERBOSE;
             $shellVerbosity = 1;
         }
         return $shellVerbosity;
     }
-    private function checkColorSupport()
+    private function checkColorSupport() : bool
     {
-        if ($this->hasParameter(array('--ansi'))) {
+        if ($this->hasParameter(['--ansi'])) {
             return \true;
         }
-        if ($this->hasParameter(array('--no-ansi'))) {
+        if ($this->hasParameter(['--no-ansi'])) {
             return \false;
         }
         if (\DIRECTORY_SEPARATOR === '\\') {
-            return \function_exists('sapi_windows_vt100_support') && \sapi_windows_vt100_support(\STDOUT) || \false !== \getenv('ANSICON') || 'ON' === \getenv('ConEmuANSI') || 'xterm' === \getenv('TERM');
+            return function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(STDOUT) || \false !== getenv('ANSICON') || 'ON' === getenv('ConEmuANSI') || 'xterm' === getenv('TERM');
         }
-        if (\function_exists('stream_isatty')) {
-            return \stream_isatty(\STDOUT);
+        if (function_exists('stream_isatty')) {
+            return stream_isatty(STDOUT);
         }
-        if (\function_exists('posix_isatty')) {
-            return \posix_isatty(\STDOUT);
+        if (function_exists('posix_isatty')) {
+            return posix_isatty(STDOUT);
         }
-        $stat = \fstat(\STDOUT);
+        $stat = fstat(STDOUT);
         return $stat ? 020000 === ($stat['mode'] & 0170000) : \false;
     }
 }
diff --git a/.requirement-checker/src/IsExtensionFulfilled.php b/.requirement-checker/src/IsExtensionFulfilled.php
index a02bda83e..87c88e471 100644
--- a/.requirement-checker/src/IsExtensionFulfilled.php
+++ b/.requirement-checker/src/IsExtensionFulfilled.php
@@ -2,15 +2,16 @@
 
 namespace HumbugBox3160\KevinGH\RequirementChecker;
 
+use function extension_loaded;
 final class IsExtensionFulfilled implements IsFulfilled
 {
     private $requiredExtension;
-    public function __construct($requiredExtension)
+    public function __construct(string $requiredExtension)
     {
         $this->requiredExtension = $requiredExtension;
     }
-    public function __invoke()
+    public function __invoke() : bool
     {
-        return \extension_loaded($this->requiredExtension);
+        return extension_loaded($this->requiredExtension);
     }
 }
diff --git a/.requirement-checker/src/IsFulfilled.php b/.requirement-checker/src/IsFulfilled.php
index 628bc5590..0046001d5 100644
--- a/.requirement-checker/src/IsFulfilled.php
+++ b/.requirement-checker/src/IsFulfilled.php
@@ -4,5 +4,5 @@
 
 interface IsFulfilled
 {
-    public function __invoke();
+    public function __invoke() : bool;
 }
diff --git a/.requirement-checker/src/IsPhpVersionFulfilled.php b/.requirement-checker/src/IsPhpVersionFulfilled.php
index 54a1b5717..7e7fea6c9 100644
--- a/.requirement-checker/src/IsPhpVersionFulfilled.php
+++ b/.requirement-checker/src/IsPhpVersionFulfilled.php
@@ -3,15 +3,16 @@
 namespace HumbugBox3160\KevinGH\RequirementChecker;
 
 use HumbugBox3160\Composer\Semver\Semver;
+use function sprintf;
 final class IsPhpVersionFulfilled implements IsFulfilled
 {
     private $requiredPhpVersion;
-    public function __construct($requiredPhpVersion)
+    public function __construct(string $requiredPhpVersion)
     {
         $this->requiredPhpVersion = $requiredPhpVersion;
     }
-    public function __invoke()
+    public function __invoke() : bool
     {
-        return Semver::satisfies(\sprintf('%d.%d.%d', \PHP_MAJOR_VERSION, \PHP_MINOR_VERSION, \PHP_RELEASE_VERSION), $this->requiredPhpVersion);
+        return Semver::satisfies(sprintf('%d.%d.%d', \PHP_MAJOR_VERSION, \PHP_MINOR_VERSION, \PHP_RELEASE_VERSION), $this->requiredPhpVersion);
     }
 }
diff --git a/.requirement-checker/src/Printer.php b/.requirement-checker/src/Printer.php
index 718313377..ce858e33d 100644
--- a/.requirement-checker/src/Printer.php
+++ b/.requirement-checker/src/Printer.php
@@ -2,13 +2,25 @@
 
 namespace HumbugBox3160\KevinGH\RequirementChecker;
 
+use function array_shift;
+use function count;
+use function explode;
+use function ltrim;
+use function min;
+use function sprintf;
+use function str_pad;
+use function str_repeat;
+use function strlen;
+use function trim;
+use function wordwrap;
+use const PHP_EOL;
 final class Printer
 {
-    private $styles = array('reset' => "\x1b[0m", 'red' => "\x1b[31m", 'green' => "\x1b[32m", 'yellow' => "\x1b[33m", 'title' => "\x1b[33m", 'error' => "\x1b[37;41m", 'success' => "\x1b[30;42m");
+    private $styles = ['reset' => "\x1b[0m", 'red' => "\x1b[31m", 'green' => "\x1b[32m", 'yellow' => "\x1b[33m", 'title' => "\x1b[33m", 'error' => "\x1b[37;41m", 'success' => "\x1b[30;42m"];
     private $verbosity;
     private $supportColors;
     private $width;
-    public function __construct($verbosity, $supportColors, $width = null)
+    public function __construct(int $verbosity, bool $supportColors, ?int $width = null)
     {
         if (null === $width) {
             $terminal = new Terminal();
@@ -18,71 +30,70 @@ public function __construct($verbosity, $supportColors, $width = null)
         $this->supportColors = $supportColors;
         $this->width = $width ?: 80;
     }
-    public function getVerbosity()
+    public function getVerbosity() : int
     {
         return $this->verbosity;
     }
-    public function setVerbosity($verbosity)
+    public function setVerbosity($verbosity) : void
     {
         $this->verbosity = $verbosity;
     }
-    public function title($title, $verbosity, $style = null)
+    public function title(string $title, int $verbosity, ?string $style = null) : void
     {
         if (null === $style) {
             $style = 'title';
         }
         $this->printvln('', $verbosity, $style);
         $this->printvln($title, $verbosity, $style);
-        $this->printvln(\str_repeat('=', \min(\strlen($title), $this->width)), $verbosity, $style);
+        $this->printvln(str_repeat('=', min(strlen($title), $this->width)), $verbosity, $style);
         $this->printvln('', $verbosity, $style);
     }
-    public function getRequirementErrorMessage(Requirement $requirement)
+    public function getRequirementErrorMessage(Requirement $requirement) : ?string
     {
         if ($requirement->isFulfilled()) {
             return null;
         }
-        $errorMessage = \wordwrap($requirement->getTestMessage(), $this->width - 3, \PHP_EOL . '   ') . \PHP_EOL;
-        return $errorMessage;
+        return wordwrap($requirement->getTestMessage(), $this->width - 3, PHP_EOL . '   ') . PHP_EOL;
     }
-    public function block($title, $message, $verbosity, $style = null)
+    public function block(string $title, string $message, int $verbosity, ?string $style = null) : void
     {
         $prefix = ' [' . $title . '] ';
-        $lineLength = $this->width - \strlen($prefix) - 1;
+        $lineLength = $this->width - strlen($prefix) - 1;
         if ($lineLength < 0) {
             $lineLength = 0;
         }
-        $message = $prefix . \trim($message);
-        $lines = array();
+        $message = $prefix . trim($message);
+        $lines = [];
         $remainingMessage = $message;
-        $wrapped = \wordwrap($remainingMessage, $lineLength, '¬');
-        $wrapped = \explode('¬', $wrapped);
+        $wrapped = wordwrap($remainingMessage, $lineLength, '¬');
+        $wrapped = explode('¬', $wrapped);
         do {
-            $line = \array_shift($wrapped);
+            $line = array_shift($wrapped);
             if ($lines && $lineLength > 0) {
-                $line = \str_repeat(' ', \strlen($prefix)) . \ltrim($line);
+                $line = str_repeat(' ', strlen($prefix)) . ltrim($line);
             }
-            $lines[] = \str_pad($line, $this->width, ' ', \STR_PAD_RIGHT);
-        } while (\count($wrapped));
+            $lines[] = str_pad($line, $this->width, ' ', \STR_PAD_RIGHT);
+        } while (count($wrapped));
         $this->printvln('', $verbosity);
-        $this->printvln(\str_repeat(' ', $this->width), $verbosity, $style);
+        $this->printvln(str_repeat(' ', $this->width), $verbosity, $style);
         foreach ($lines as $line) {
             $this->printvln($line, $verbosity, $style);
         }
-        $this->printv(\str_repeat(' ', $this->width), $verbosity, $style);
+        $this->printv(str_repeat(' ', $this->width), $verbosity, $style);
         $this->printvln('', $verbosity);
     }
-    public function printvln($message, $verbosity, $style = null)
+    public function printvln(string $message, int $verbosity, ?string $style = null) : void
     {
         $this->printv($message, $verbosity, $style);
-        $this->printv(\PHP_EOL, $verbosity, null);
+        $this->printv(PHP_EOL, $verbosity, null);
     }
-    public function printv($message, $verbosity, $style = null)
+    public function printv(string $message, int $verbosity, ?string $style = null) : void
     {
         if ($verbosity > $this->verbosity) {
             return;
         }
-        $message = \wordwrap($message, $this->width);
-        $message = \sprintf('%s%s%s', $this->supportColors && isset($this->styles[$style]) ? $this->styles[$style] : '', $message, $this->supportColors ? $this->styles['reset'] : '');
+        $message = wordwrap($message, $this->width);
+        $message = sprintf('%s%s%s', $this->supportColors && isset($this->styles[$style]) ? $this->styles[$style] : '', $message, $this->supportColors ? $this->styles['reset'] : '');
         echo $message;
     }
 }
diff --git a/.requirement-checker/src/Requirement.php b/.requirement-checker/src/Requirement.php
index dd0adab10..0a70a2138 100644
--- a/.requirement-checker/src/Requirement.php
+++ b/.requirement-checker/src/Requirement.php
@@ -8,28 +8,28 @@ final class Requirement
     private $fulfilled;
     private $testMessage;
     private $helpText;
-    public function __construct($checkIsFulfilled, $testMessage, $helpText)
+    public function __construct(IsFulfilled $checkIsFulfilled, string $testMessage, string $helpText)
     {
         $this->checkIsFulfilled = $checkIsFulfilled;
         $this->testMessage = $testMessage;
         $this->helpText = $helpText;
     }
-    public function isFulfilled()
+    public function isFulfilled() : bool
     {
-        if (null === $this->fulfilled) {
+        if (!isset($this->fulfilled)) {
             $this->fulfilled = $this->checkIsFulfilled->__invoke();
         }
-        return (bool) $this->fulfilled;
+        return $this->fulfilled;
     }
-    public function getIsFullfilledChecker()
+    public function getIsFullfilledChecker() : IsFulfilled
     {
         return $this->checkIsFulfilled;
     }
-    public function getTestMessage()
+    public function getTestMessage() : string
     {
         return $this->testMessage;
     }
-    public function getHelpText()
+    public function getHelpText() : string
     {
         return $this->helpText;
     }
diff --git a/.requirement-checker/src/RequirementCollection.php b/.requirement-checker/src/RequirementCollection.php
index 82eb089e3..fab369e54 100644
--- a/.requirement-checker/src/RequirementCollection.php
+++ b/.requirement-checker/src/RequirementCollection.php
@@ -5,40 +5,39 @@
 use ArrayIterator;
 use Countable;
 use IteratorAggregate;
-use ReturnTypeWillChange;
 use Traversable;
+use function count;
+use function get_cfg_var;
 final class RequirementCollection implements IteratorAggregate, Countable
 {
-    private $requirements = array();
-    #[\ReturnTypeWillChange]
-    public function getIterator()
+    private $requirements = [];
+    public function getIterator() : Traversable
     {
         return new ArrayIterator($this->requirements);
     }
-    #[\ReturnTypeWillChange]
-    public function count()
+    public function count() : int
     {
-        return \count($this->requirements);
+        return count($this->requirements);
     }
-    public function add(Requirement $requirement)
+    public function add(Requirement $requirement) : void
     {
         $this->requirements[] = $requirement;
     }
-    public function addRequirement($checkIsFulfilled, $testMessage, $helpText)
+    public function addRequirement(IsFulfilled $checkIsFulfilled, string $testMessage, string $helpText) : void
     {
         $this->add(new Requirement($checkIsFulfilled, $testMessage, $helpText));
     }
-    public function getRequirements()
+    public function getRequirements() : array
     {
         return $this->requirements;
     }
     public function getPhpIniPath()
     {
-        return \get_cfg_var('cfg_file_path');
+        return get_cfg_var('cfg_file_path');
     }
     public function evaluateRequirements()
     {
-        return \array_reduce($this->requirements, function ($checkPassed, Requirement $requirement) {
+        return \array_reduce($this->requirements, function (bool $checkPassed, Requirement $requirement) : bool {
             return $checkPassed && $requirement->isFulfilled();
         }, \true);
     }
diff --git a/.requirement-checker/src/Terminal.php b/.requirement-checker/src/Terminal.php
index 04d313e33..317133d08 100644
--- a/.requirement-checker/src/Terminal.php
+++ b/.requirement-checker/src/Terminal.php
@@ -2,48 +2,61 @@
 
 namespace HumbugBox3160\KevinGH\RequirementChecker;
 
+use function exec;
+use function fclose;
+use function fopen;
+use function function_exists;
+use function getenv;
+use function is_resource;
+use function preg_match;
+use function proc_close;
+use function proc_open;
+use function sapi_windows_vt100_support;
+use function stream_get_contents;
+use function trim;
+use const DIRECTORY_SEPARATOR;
 class Terminal
 {
     private static $width;
     private static $height;
     private static $stty;
-    public function getWidth()
+    public function getWidth() : int
     {
-        $width = \getenv('COLUMNS');
+        $width = getenv('COLUMNS');
         if (\false !== $width) {
-            return (int) \trim($width);
+            return (int) trim($width);
         }
-        if (null === self::$width) {
+        if (!isset(self::$width)) {
             self::initDimensions();
         }
         return self::$width ?: 80;
     }
-    public function getHeight()
+    public function getHeight() : int
     {
-        $height = \getenv('LINES');
+        $height = getenv('LINES');
         if (\false !== $height) {
-            return (int) \trim($height);
+            return (int) trim($height);
         }
-        if (null === self::$height) {
+        if (!isset(self::$height)) {
             self::initDimensions();
         }
         return self::$height ?: 50;
     }
-    public static function hasSttyAvailable()
+    public static function hasSttyAvailable() : bool
     {
-        if (null !== self::$stty) {
+        if (isset(self::$stty)) {
             return self::$stty;
         }
-        if (!\function_exists('exec')) {
+        if (!function_exists('exec')) {
             return \false;
         }
-        \exec('stty 2>&1', $output, $exitcode);
+        exec('stty 2>&1', $output, $exitcode);
         return self::$stty = 0 === $exitcode;
     }
-    private static function initDimensions()
+    private static function initDimensions() : void
     {
-        if ('\\' === \DIRECTORY_SEPARATOR) {
-            if (\preg_match('/^(\\d+)x(\\d+)(?: \\((\\d+)x(\\d+)\\))?$/', \trim(\getenv('ANSICON')), $matches)) {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            if (preg_match('/^(\\d+)x(\\d+)(?: \\((\\d+)x(\\d+)\\))?$/', trim(getenv('ANSICON')), $matches)) {
                 self::$width = (int) $matches[1];
                 self::$height = isset($matches[4]) ? (int) $matches[4] : (int) $matches[2];
             } elseif (!self::hasVt100Support() && self::hasSttyAvailable()) {
@@ -56,48 +69,48 @@ private static function initDimensions()
             self::initDimensionsUsingStty();
         }
     }
-    private static function hasVt100Support()
+    private static function hasVt100Support() : bool
     {
-        return \function_exists('sapi_windows_vt100_support') && \sapi_windows_vt100_support(\fopen('php://stdout', 'wb'));
+        return function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(fopen('php://stdout', 'wb'));
     }
-    private static function initDimensionsUsingStty()
+    private static function initDimensionsUsingStty() : void
     {
         if ($sttyString = self::getSttyColumns()) {
-            if (\preg_match('/rows.(\\d+);.columns.(\\d+);/i', $sttyString, $matches)) {
+            if (preg_match('/rows.(\\d+);.columns.(\\d+);/i', $sttyString, $matches)) {
                 self::$width = (int) $matches[2];
                 self::$height = (int) $matches[1];
-            } elseif (\preg_match('/;.(\\d+).rows;.(\\d+).columns/i', $sttyString, $matches)) {
+            } elseif (preg_match('/;.(\\d+).rows;.(\\d+).columns/i', $sttyString, $matches)) {
                 self::$width = (int) $matches[2];
                 self::$height = (int) $matches[1];
             }
         }
     }
-    private static function getConsoleMode()
+    private static function getConsoleMode() : ?array
     {
         $info = self::readFromProcess('mode CON');
-        if (null === $info || !\preg_match('/--------+\\r?\\n.+?(\\d+)\\r?\\n.+?(\\d+)\\r?\\n/', $info, $matches)) {
+        if (null === $info || !preg_match('/--------+\\r?\\n.+?(\\d+)\\r?\\n.+?(\\d+)\\r?\\n/', $info, $matches)) {
             return null;
         }
         return array((int) $matches[2], (int) $matches[1]);
     }
-    private static function getSttyColumns()
+    private static function getSttyColumns() : ?string
     {
         return self::readFromProcess('stty -a | grep columns');
     }
-    private static function readFromProcess($command)
+    private static function readFromProcess(string $command) : ?string
     {
-        if (!\function_exists('proc_open')) {
+        if (!function_exists('proc_open')) {
             return null;
         }
-        $descriptorspec = array(1 => array('pipe', 'w'), 2 => array('pipe', 'w'));
-        $process = \proc_open($command, $descriptorspec, $pipes, null, null, array('suppress_errors' => \true));
-        if (!\is_resource($process)) {
+        $descriptorspec = [1 => ['pipe', 'w'], 2 => ['pipe', 'w']];
+        $process = proc_open($command, $descriptorspec, $pipes, null, null, ['suppress_errors' => \true]);
+        if (!is_resource($process)) {
             return null;
         }
-        $info = \stream_get_contents($pipes[1]);
-        \fclose($pipes[1]);
-        \fclose($pipes[2]);
-        \proc_close($process);
+        $info = stream_get_contents($pipes[1]);
+        fclose($pipes[1]);
+        fclose($pipes[2]);
+        proc_close($process);
         return $info;
     }
 }
diff --git a/.requirement-checker/vendor/autoload.php b/.requirement-checker/vendor/autoload.php
index 0d3ff9b5f..c2df50a28 100644
--- a/.requirement-checker/vendor/autoload.php
+++ b/.requirement-checker/vendor/autoload.php
@@ -2,6 +2,11 @@
 
 // autoload.php @generated by Composer
 
+if (PHP_VERSION_ID < 50600) {
+    echo 'Composer 2.3.0 dropped support for autoloading on PHP <5.6 and you are running '.PHP_VERSION.', please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.'.PHP_EOL;
+    exit(1);
+}
+
 require_once __DIR__ . '/composer/autoload_real.php';
 
-return ComposerAutoloaderInit7483a8755c1da229c4754f7d15655976::getLoader();
+return ComposerAutoloaderInitc3988cc2cd530688db10eca392dd6bba::getLoader();
diff --git a/.requirement-checker/vendor/composer/autoload_classmap.php b/.requirement-checker/vendor/composer/autoload_classmap.php
index 0991a8b17..223be763b 100644
--- a/.requirement-checker/vendor/composer/autoload_classmap.php
+++ b/.requirement-checker/vendor/composer/autoload_classmap.php
@@ -2,7 +2,7 @@
 
 // autoload_classmap.php @generated by Composer
 
-$vendorDir = dirname(dirname(__FILE__));
+$vendorDir = dirname(__DIR__);
 $baseDir = dirname($vendorDir);
 
 return array(
diff --git a/.requirement-checker/vendor/composer/autoload_namespaces.php b/.requirement-checker/vendor/composer/autoload_namespaces.php
index b7fc0125d..15a2ff3ad 100644
--- a/.requirement-checker/vendor/composer/autoload_namespaces.php
+++ b/.requirement-checker/vendor/composer/autoload_namespaces.php
@@ -2,7 +2,7 @@
 
 // autoload_namespaces.php @generated by Composer
 
-$vendorDir = dirname(dirname(__FILE__));
+$vendorDir = dirname(__DIR__);
 $baseDir = dirname($vendorDir);
 
 return array(
diff --git a/.requirement-checker/vendor/composer/autoload_psr4.php b/.requirement-checker/vendor/composer/autoload_psr4.php
index eb6c66322..c3b25d6f1 100644
--- a/.requirement-checker/vendor/composer/autoload_psr4.php
+++ b/.requirement-checker/vendor/composer/autoload_psr4.php
@@ -2,7 +2,7 @@
 
 // autoload_psr4.php @generated by Composer
 
-$vendorDir = dirname(dirname(__FILE__));
+$vendorDir = dirname(__DIR__);
 $baseDir = dirname($vendorDir);
 
 return array(
diff --git a/.requirement-checker/vendor/composer/autoload_real.php b/.requirement-checker/vendor/composer/autoload_real.php
index 4d607b3c4..68f084908 100644
--- a/.requirement-checker/vendor/composer/autoload_real.php
+++ b/.requirement-checker/vendor/composer/autoload_real.php
@@ -2,7 +2,7 @@
 
 // autoload_real.php @generated by Composer
 
-class ComposerAutoloaderInit7483a8755c1da229c4754f7d15655976
+class ComposerAutoloaderInitc3988cc2cd530688db10eca392dd6bba
 {
     private static $loader;
 
@@ -22,21 +22,12 @@ public static function getLoader()
             return self::$loader;
         }
 
-        spl_autoload_register(array('ComposerAutoloaderInit7483a8755c1da229c4754f7d15655976', 'loadClassLoader'), true, true);
-        self::$loader = $loader = new \Composer\Autoload\ClassLoader(\dirname(\dirname(__FILE__)));
-        spl_autoload_unregister(array('ComposerAutoloaderInit7483a8755c1da229c4754f7d15655976', 'loadClassLoader'));
+        spl_autoload_register(array('ComposerAutoloaderInitc3988cc2cd530688db10eca392dd6bba', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader(\dirname(__DIR__));
+        spl_autoload_unregister(array('ComposerAutoloaderInitc3988cc2cd530688db10eca392dd6bba', 'loadClassLoader'));
 
-        $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION') && (!function_exists('zend_loader_file_encoded') || !zend_loader_file_encoded());
-        if ($useStaticLoader) {
-            require __DIR__ . '/autoload_static.php';
-
-            call_user_func(\Composer\Autoload\ComposerStaticInit7483a8755c1da229c4754f7d15655976::getInitializer($loader));
-        } else {
-            $classMap = require __DIR__ . '/autoload_classmap.php';
-            if ($classMap) {
-                $loader->addClassMap($classMap);
-            }
-        }
+        require __DIR__ . '/autoload_static.php';
+        call_user_func(\Composer\Autoload\ComposerStaticInitc3988cc2cd530688db10eca392dd6bba::getInitializer($loader));
 
         $loader->setClassMapAuthoritative(true);
         $loader->register(true);
diff --git a/.requirement-checker/vendor/composer/autoload_static.php b/.requirement-checker/vendor/composer/autoload_static.php
index 79b593377..78c45bb55 100644
--- a/.requirement-checker/vendor/composer/autoload_static.php
+++ b/.requirement-checker/vendor/composer/autoload_static.php
@@ -4,7 +4,7 @@
 
 namespace Composer\Autoload;
 
-class ComposerStaticInit7483a8755c1da229c4754f7d15655976
+class ComposerStaticInitc3988cc2cd530688db10eca392dd6bba
 {
     public static $prefixLengthsPsr4 = array (
         'H' => 
@@ -53,9 +53,9 @@ class ComposerStaticInit7483a8755c1da229c4754f7d15655976
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInit7483a8755c1da229c4754f7d15655976::$prefixLengthsPsr4;
-            $loader->prefixDirsPsr4 = ComposerStaticInit7483a8755c1da229c4754f7d15655976::$prefixDirsPsr4;
-            $loader->classMap = ComposerStaticInit7483a8755c1da229c4754f7d15655976::$classMap;
+            $loader->prefixLengthsPsr4 = ComposerStaticInitc3988cc2cd530688db10eca392dd6bba::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInitc3988cc2cd530688db10eca392dd6bba::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInitc3988cc2cd530688db10eca392dd6bba::$classMap;
 
         }, null, ClassLoader::class);
     }
diff --git a/.requirement-checker/vendor/composer/semver/src/VersionParser.php b/.requirement-checker/vendor/composer/semver/src/VersionParser.php
index aac114f92..0d0cd847d 100644
--- a/.requirement-checker/vendor/composer/semver/src/VersionParser.php
+++ b/.requirement-checker/vendor/composer/semver/src/VersionParser.php
@@ -15,7 +15,7 @@ class VersionParser
     */
     public static function parseStability($version)
     {
-        $version = (string) \preg_replace('{#.+$}', '', $version);
+        $version = (string) \preg_replace('{#.+$}', '', (string) $version);
         if (\strpos($version, 'dev-') === 0 || '-dev' === \substr($version, -4)) {
             return 'dev';
         }
@@ -38,12 +38,12 @@ public static function parseStability($version)
     }
     public static function normalizeStability($stability)
     {
-        $stability = \strtolower($stability);
+        $stability = \strtolower((string) $stability);
         return $stability === 'rc' ? 'RC' : $stability;
     }
     public function normalize($version, $fullVersion = null)
     {
-        $version = \trim($version);
+        $version = \trim((string) $version);
         $origVersion = $version;
         if (null === $fullVersion) {
             $fullVersion = $version;
@@ -101,14 +101,14 @@ public function normalize($version, $fullVersion = null)
     }
     public function parseNumericAliasPrefix($branch)
     {
-        if (\preg_match('{^(?P<version>(\\d++\\.)*\\d++)(?:\\.x)?-dev$}i', $branch, $matches)) {
+        if (\preg_match('{^(?P<version>(\\d++\\.)*\\d++)(?:\\.x)?-dev$}i', (string) $branch, $matches)) {
             return $matches['version'] . '.';
         }
         return \false;
     }
     public function normalizeBranch($name)
     {
-        $name = \trim($name);
+        $name = \trim((string) $name);
         if (\preg_match('{^v?(\\d++)(\\.(?:\\d++|[xX*]))?(\\.(?:\\d++|[xX*]))?(\\.(?:\\d++|[xX*]))?$}i', $name, $matches)) {
             $version = '';
             for ($i = 1; $i < 5; ++$i) {
@@ -123,12 +123,12 @@ public function normalizeDefaultBranch($name)
         if ($name === 'dev-master' || $name === 'dev-default' || $name === 'dev-trunk') {
             return '9999999-dev';
         }
-        return $name;
+        return (string) $name;
     }
     public function parseConstraints($constraints)
     {
-        $prettyConstraint = $constraints;
-        $orConstraints = \preg_split('{\\s*\\|\\|?\\s*}', \trim($constraints));
+        $prettyConstraint = (string) $constraints;
+        $orConstraints = \preg_split('{\\s*\\|\\|?\\s*}', \trim((string) $constraints));
         if (\false === $orConstraints) {
             throw new \RuntimeException('Failed to preg_split string: ' . $constraints);
         }
diff --git a/Makefile b/Makefile
index c01ab8935..e64e39e36 100644
--- a/Makefile
+++ b/Makefile
@@ -70,7 +70,7 @@ tu_requirement_checker:	 ## Runs the unit tests
 tu_requirement_checker: requirement-checker/bin/phpunit requirement-checker/actual_terminal_diff
 	cd requirement-checker && $(PHPNOGC) bin/phpunit
 
-	diff --side-by-side --suppress-common-lines requirement-checker/expected_terminal_diff requirement-checker/actual_terminal_diff
+	diff --ignore-all-space --side-by-side --suppress-common-lines requirement-checker/expected_terminal_diff requirement-checker/actual_terminal_diff
 
 .PHONY: tc
 tc:			 ## Runs the unit tests with code coverage
@@ -101,13 +101,13 @@ e2e_scoper_expose_symbols: box fixtures/build/dir011/vendor
 	php fixtures/build/dir011/index.phar > fixtures/build/dir011/output
 	cd fixtures/build/dir011 && php -r "file_put_contents('phar-Y.php', file_get_contents((new Phar('index.phar'))['src/Y.php']));"
 
-	diff --side-by-side --suppress-common-lines fixtures/build/dir011/expected-output fixtures/build/dir011/output
-	diff --side-by-side --suppress-common-lines fixtures/build/dir011/phar-Y.php fixtures/build/dir011/src/Y.php
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/build/dir011/expected-output fixtures/build/dir011/output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/build/dir011/phar-Y.php fixtures/build/dir011/src/Y.php
 
 .PHONY: e2e_check_requirements
 DOCKER=docker run -i --platform linux/amd64 --rm -w /opt/box
-PHP5_BOX=box_php53
-PHP5_PHAR=$(PHP5_BOX) php index.phar -vvv --no-ansi
+PHP_COMPOSER_MIN_BOX=box_php725
+PHP_COMPOSER_MIN_PHAR=$(PHP_COMPOSER_MIN_BOX) php index.phar -vvv --no-ansi
 MIN_SUPPORTED_PHP_BOX=box_php81
 MIN_SUPPORTED_PHP_WITH_XDEBUG_BOX=box_php81_xdebug
 MIN_SUPPORTED_PHP_PHAR=$(MIN_SUPPORTED_PHP_BOX) php index.phar -vvv --no-ansi
@@ -121,14 +121,14 @@ e2e_check_requirements: box .requirement-checker
 
 	./box compile --working-dir=fixtures/check-requirements/pass-no-config/
 
-	# 5.3
-	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP5_BOX) php -r 'echo PHP_VERSION;')/" \
-		fixtures/check-requirements/pass-no-config/expected-output-53-dist \
-		> fixtures/check-requirements/pass-no-config/expected-output-53
+	# Composer min version
+	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP_COMPOSER_MIN_BOX) php -r 'echo PHP_VERSION;')/" \
+		fixtures/check-requirements/pass-no-config/expected-output-725-dist \
+		> fixtures/check-requirements/pass-no-config/expected-output-725
 
 	rm fixtures/check-requirements/pass-no-config/actual-output || true
-	$(DOCKER) -v "$$PWD/fixtures/check-requirements/pass-no-config":/opt/box $(PHP5_PHAR) | tee fixtures/check-requirements/pass-no-config/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/pass-no-config/expected-output-53 fixtures/check-requirements/pass-no-config/actual-output
+	$(DOCKER) -v "$$PWD/fixtures/check-requirements/pass-no-config":/opt/box $(PHP_COMPOSER_MIN_PHAR) | tee fixtures/check-requirements/pass-no-config/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/pass-no-config/expected-output-725 fixtures/check-requirements/pass-no-config/actual-output
 
 	# Current min version
 	sed "s/PHP_VERSION/$$($(DOCKER) $(MIN_SUPPORTED_PHP_BOX) php -r 'echo PHP_VERSION;')/" \
@@ -137,7 +137,7 @@ e2e_check_requirements: box .requirement-checker
 
 	rm fixtures/check-requirements/pass-no-config/actual-output || true
 	$(DOCKER) -v "$$PWD/fixtures/check-requirements/pass-no-config":/opt/box $(MIN_SUPPORTED_PHP_PHAR) | tee fixtures/check-requirements/pass-no-config/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/pass-no-config/expected-output-current-min-php fixtures/check-requirements/pass-no-config/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/pass-no-config/expected-output-current-min-php fixtures/check-requirements/pass-no-config/actual-output
 
 	#
 	# Pass complete
@@ -145,14 +145,14 @@ e2e_check_requirements: box .requirement-checker
 
 	./box compile --working-dir=fixtures/check-requirements/pass-complete/
 
-	# 5.3
-	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP5_BOX) php -r 'echo PHP_VERSION;')/" \
-		fixtures/check-requirements/pass-complete/expected-output-53-dist \
-		> fixtures/check-requirements/pass-complete/expected-output-53
+	# Composer min version
+	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP_COMPOSER_MIN_BOX) php -r 'echo PHP_VERSION;')/" \
+		fixtures/check-requirements/pass-complete/expected-output-725-dist \
+		> fixtures/check-requirements/pass-complete/expected-output-725
 
 	rm fixtures/check-requirements/pass-complete/actual-output || true
-	$(DOCKER) -v "$$PWD/fixtures/check-requirements/pass-complete":/opt/box $(PHP5_PHAR) | tee fixtures/check-requirements/pass-complete/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/pass-complete/expected-output-53 fixtures/check-requirements/pass-complete/actual-output
+	$(DOCKER) -v "$$PWD/fixtures/check-requirements/pass-complete":/opt/box $(PHP_COMPOSER_MIN_PHAR) | tee fixtures/check-requirements/pass-complete/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/pass-complete/expected-output-725 fixtures/check-requirements/pass-complete/actual-output
 
 	# Current min version
 	sed "s/PHP_VERSION/$$($(DOCKER) $(MIN_SUPPORTED_PHP_BOX) php -r 'echo PHP_VERSION;')/" \
@@ -161,7 +161,7 @@ e2e_check_requirements: box .requirement-checker
 
 	rm fixtures/check-requirements/pass-complete/actual-output || true
 	$(DOCKER) -v "$$PWD/fixtures/check-requirements/pass-complete":/opt/box $(MIN_SUPPORTED_PHP_PHAR) | tee fixtures/check-requirements/pass-complete/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/pass-complete/expected-output-current-min-php fixtures/check-requirements/pass-complete/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/pass-complete/expected-output-current-min-php fixtures/check-requirements/pass-complete/actual-output
 
 	#
 	# Fail complete
@@ -169,14 +169,14 @@ e2e_check_requirements: box .requirement-checker
 
 	./box compile --working-dir=fixtures/check-requirements/fail-complete/
 
-	# 5.3
-	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP5_BOX) php -r 'echo PHP_VERSION;')/" \
-    		fixtures/check-requirements/fail-complete/expected-output-53-dist \
-    		> fixtures/check-requirements/fail-complete/expected-output-53
+	# Composer min version
+	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP_COMPOSER_MIN_BOX) php -r 'echo PHP_VERSION;')/" \
+    		fixtures/check-requirements/fail-complete/expected-output-725-dist \
+    		> fixtures/check-requirements/fail-complete/expected-output-725
 
 	rm fixtures/check-requirements/fail-complete/actual-output || true
-	$(DOCKER) -v "$$PWD/fixtures/check-requirements/fail-complete":/opt/box $(PHP5_PHAR) | tee fixtures/check-requirements/fail-complete/actual-output || true
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/fail-complete/expected-output-53 fixtures/check-requirements/fail-complete/actual-output
+	$(DOCKER) -v "$$PWD/fixtures/check-requirements/fail-complete":/opt/box $(PHP_COMPOSER_MIN_PHAR) | tee fixtures/check-requirements/fail-complete/actual-output || true
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/fail-complete/expected-output-725 fixtures/check-requirements/fail-complete/actual-output
 
 	# Current min version
 	sed "s/PHP_VERSION/$$($(DOCKER) $(MIN_SUPPORTED_PHP_BOX) php -r 'echo PHP_VERSION;')/" \
@@ -185,7 +185,7 @@ e2e_check_requirements: box .requirement-checker
 
 	rm fixtures/check-requirements/fail-complete/actual-output || true
 	$(DOCKER) -v "$$PWD/fixtures/check-requirements/fail-complete":/opt/box $(MIN_SUPPORTED_PHP_PHAR) | tee fixtures/check-requirements/fail-complete/actual-output || true
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/fail-complete/expected-output-current-min-php fixtures/check-requirements/fail-complete/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/fail-complete/expected-output-current-min-php fixtures/check-requirements/fail-complete/actual-output
 
 	#
 	# Skip the requirement check
@@ -193,13 +193,13 @@ e2e_check_requirements: box .requirement-checker
 
 	./box compile --working-dir=fixtures/check-requirements/fail-complete/
 
-	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP5_BOX) php -r 'echo PHP_VERSION;')/" \
-			fixtures/check-requirements/fail-complete/expected-output-53-dist-skipped \
-			> fixtures/check-requirements/fail-complete/expected-output-53
+	sed "s/PHP_VERSION/$$($(DOCKER) $(PHP_COMPOSER_MIN_BOX) php -r 'echo PHP_VERSION;')/" \
+			fixtures/check-requirements/fail-complete/expected-output-725-dist-skipped \
+			> fixtures/check-requirements/fail-complete/expected-output-725
 
 	rm fixtures/check-requirements/fail-complete/actual-output || true
-	$(DOCKER) -e BOX_REQUIREMENT_CHECKER=0 -v "$$PWD/fixtures/check-requirements/fail-complete":/opt/box $(PHP5_PHAR) | tee fixtures/check-requirements/fail-complete/actual-output || true
-	diff --side-by-side --suppress-common-lines fixtures/check-requirements/fail-complete/expected-output-53 fixtures/check-requirements/fail-complete/actual-output
+	$(DOCKER) -e BOX_REQUIREMENT_CHECKER=0 -v "$$PWD/fixtures/check-requirements/fail-complete":/opt/box $(PHP_COMPOSER_MIN_PHAR) | tee fixtures/check-requirements/fail-complete/actual-output || true
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/check-requirements/fail-complete/expected-output-725 fixtures/check-requirements/fail-complete/actual-output
 
 BOX_COMPILE=./box compile --working-dir=fixtures/php-settings-checker -vvv --no-ansi
 ifeq ($(OS),Darwin)
@@ -217,7 +217,7 @@ e2e_php_settings_checker: docker-images fixtures/php-settings-checker/output-xde
 		| grep '\[debug\]' \
 		| tee fixtures/php-settings-checker/actual-output || true
 	$(SED) "s/Xdebug/xdebug/" fixtures/php-settings-checker/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-all-clear fixtures/php-settings-checker/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-all-clear fixtures/php-settings-checker/actual-output
 
 	@echo "$(CCYELLOW)Xdebug enabled: restart needed$(CCEND)"
 	$(DOCKER) -v "$$PWD":/opt/box $(MIN_SUPPORTED_PHP_BOX)_xdebug \
@@ -227,7 +227,7 @@ e2e_php_settings_checker: docker-images fixtures/php-settings-checker/output-xde
 		| tee fixtures/php-settings-checker/actual-output || true
 	$(SED) "s/Xdebug/xdebug/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/[0-9]* ms/100 ms/" fixtures/php-settings-checker/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-xdebug-enabled fixtures/php-settings-checker/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-xdebug-enabled fixtures/php-settings-checker/actual-output
 
 	@echo "$(CCYELLOW)phar.readonly enabled: restart needed$(CCEND)"
 	$(DOCKER) -v "$$PWD":/opt/box $(MIN_SUPPORTED_PHP_BOX) \
@@ -238,7 +238,7 @@ e2e_php_settings_checker: docker-images fixtures/php-settings-checker/output-xde
 	$(SED) "s/Xdebug/xdebug/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/'-c' '.*' '\.\/box'/'-c' '\/tmp-file' 'bin\/box'/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/[0-9]* ms/100 ms/" fixtures/php-settings-checker/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-pharreadonly-enabled fixtures/php-settings-checker/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-pharreadonly-enabled fixtures/php-settings-checker/actual-output
 
 	@echo "$(CCYELLOW)Bump min memory limit if necessary (limit lower than default)$(CCEND)"
 	$(DOCKER) -v "$$PWD":/opt/box $(MIN_SUPPORTED_PHP_BOX) \
@@ -249,7 +249,7 @@ e2e_php_settings_checker: docker-images fixtures/php-settings-checker/output-xde
 	$(SED) "s/Xdebug/xdebug/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/'-c' '.*' '\.\/box'/'-c' '\/tmp-file' 'bin\/box'/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/[0-9]* ms/100 ms/" fixtures/php-settings-checker/actual-output
-	diff --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-min-memory-limit fixtures/php-settings-checker/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/php-settings-checker/output-min-memory-limit fixtures/php-settings-checker/actual-output
 
 	@echo "$(CCYELLOW)Bump min memory limit if necessary (limit higher than default)$(CCEND)"
 	$(DOCKER) -e BOX_MEMORY_LIMIT=64M -v "$$PWD":/opt/box $(MIN_SUPPORTED_PHP_BOX) \
@@ -260,7 +260,7 @@ e2e_php_settings_checker: docker-images fixtures/php-settings-checker/output-xde
 	$(SED) "s/Xdebug/xdebug/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/'-c' '.*' '\.\/box'/'-c' '\/tmp-file' 'bin\/box'/" fixtures/php-settings-checker/actual-output
 	$(SED) "s/[0-9]* ms/100 ms/" fixtures/php-settings-checker/actual-output
-	diff --side-by-side --suppress-common-lines  fixtures/php-settings-checker/output-set-memory-limit fixtures/php-settings-checker/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines  fixtures/php-settings-checker/output-set-memory-limit fixtures/php-settings-checker/actual-output
 
 .PHONY: e2e_symfony
 e2e_symfony:		 ## Packages a fresh Symfony app
@@ -274,7 +274,7 @@ e2e_symfony: fixtures/build/dir012/vendor box
 
 	php fixtures/build/dir012/bin/console.phar --version > fixtures/build/dir012/actual-output
 
-	diff --side-by-side --suppress-common-lines fixtures/build/dir012/expected-output fixtures/build/dir012/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/build/dir012/expected-output fixtures/build/dir012/actual-output
 
 .PHONY: e2e_composer_installed_versions
 e2e_composer_installed_versions:		 ## Packages an app using Composer\InstalledVersions
@@ -283,7 +283,7 @@ e2e_composer_installed_versions: fixtures/build/dir013/vendor box
 	
 	php fixtures/build/dir013/bin/run.phar > fixtures/build/dir013/actual-output
 
-	diff --side-by-side --suppress-common-lines fixtures/build/dir013/expected-output fixtures/build/dir013/actual-output
+	diff --ignore-all-space --side-by-side --suppress-common-lines fixtures/build/dir013/expected-output fixtures/build/dir013/actual-output
 
 .PHONY: e2e_phpstorm_stubs
 e2e_phpstorm_stubs:		 ## Project using symbols which should be vetted by PhpStormStubs
@@ -389,7 +389,7 @@ fixtures/default_stub.php:
 	touch $@
 
 requirement-checker/actual_terminal_diff: requirement-checker/src/Terminal.php vendor/symfony/console/Terminal.php
-	(diff --side-by-side --suppress-common-lines vendor/symfony/console/Terminal.php requirement-checker/src/Terminal.php || true) > requirement-checker/actual_terminal_diff
+	(diff --ignore-all-space --side-by-side --suppress-common-lines vendor/symfony/console/Terminal.php requirement-checker/src/Terminal.php || true) > requirement-checker/actual_terminal_diff
 
 tests/Console/DisplayNormalizer.php: vendor
 vendor/symfony/console/Terminal.php: vendor
diff --git a/doc/requirement-checker.md b/doc/requirement-checker.md
index 265c2361c..e659635ae 100644
--- a/doc/requirement-checker.md
+++ b/doc/requirement-checker.md
@@ -120,8 +120,8 @@ require the requirement checker script `.box/check_requirements.php` like so:
 require 'phar://acme.phar/.box/check_requirements.php';
 ```
 
-The requirement checker works down to PHP 5.3+. If however you are including it after your custom code which is not
-PHP 5.3+ compatible, it will fail before the requirements are being checked.
+The requirement checker works down to PHP 7.2.5+. If however you are including it after your custom code which is not
+PHP 7.2.5+ compatible, it will fail before the requirements are being checked.
 
 
 ## Skipping the requirement checker
diff --git a/fixtures/check-requirements/fail-complete/expected-output-53-dist-skipped b/fixtures/check-requirements/fail-complete/expected-output-53-dist-skipped
deleted file mode 100644
index 2f28dce33..000000000
--- a/fixtures/check-requirements/fail-complete/expected-output-53-dist-skipped
+++ /dev/null
@@ -1,6 +0,0 @@
-
-Fatal error: Uncaught exception 'Exception' with message 'Should not be executed!' in phar:///opt/box/index.phar/index.php:13
-Stack trace:
-#0 /opt/box/index.phar(14): require()
-#1 {main}
-  thrown in phar:///opt/box/index.phar/index.php on line 13
diff --git a/fixtures/check-requirements/fail-complete/expected-output-53-dist b/fixtures/check-requirements/fail-complete/expected-output-725-dist
similarity index 99%
rename from fixtures/check-requirements/fail-complete/expected-output-53-dist
rename to fixtures/check-requirements/fail-complete/expected-output-725-dist
index c7c03f606..c709ce90a 100644
--- a/fixtures/check-requirements/fail-complete/expected-output-53-dist
+++ b/fixtures/check-requirements/fail-complete/expected-output-725-dist
@@ -14,7 +14,7 @@ Box Requirements Checker
 it or install a polyfill.
   ✘ The package "package-with-extensions" requires the extension "random".
 Enable it or install a polyfill.
-  
+
                                                                                 
  [ERROR] Your system is not ready to run the application.                       
                                                                                 
diff --git a/fixtures/check-requirements/fail-complete/expected-output-725-dist-skipped b/fixtures/check-requirements/fail-complete/expected-output-725-dist-skipped
new file mode 100644
index 000000000..3390985ed
--- /dev/null
+++ b/fixtures/check-requirements/fail-complete/expected-output-725-dist-skipped
@@ -0,0 +1,6 @@
+
+Fatal error: Uncaught Exception: Should not be executed! in phar:///opt/box/index.phar/index.php:13
+Stack trace:
+#0 /opt/box/index.phar(14): require()
+#1 {main}
+  thrown in phar:///opt/box/index.phar/index.php on line 13
diff --git a/fixtures/check-requirements/pass-complete/expected-output-53-dist b/fixtures/check-requirements/pass-complete/expected-output-725-dist
similarity index 100%
rename from fixtures/check-requirements/pass-complete/expected-output-53-dist
rename to fixtures/check-requirements/pass-complete/expected-output-725-dist
diff --git a/fixtures/check-requirements/pass-no-config/expected-output-53-dist b/fixtures/check-requirements/pass-no-config/expected-output-725-dist
similarity index 100%
rename from fixtures/check-requirements/pass-no-config/expected-output-53-dist
rename to fixtures/check-requirements/pass-no-config/expected-output-725-dist
diff --git a/requirement-checker/composer.json b/requirement-checker/composer.json
index fbf313632..7c5d9503e 100644
--- a/requirement-checker/composer.json
+++ b/requirement-checker/composer.json
@@ -25,7 +25,7 @@
     },
 
     "require": {
-        "php": ">=5.3",
+        "php": ">=7.2.5",
         "ext-phar": "*",
         "composer/semver": "^3.2"
     },
diff --git a/requirement-checker/composer.lock b/requirement-checker/composer.lock
index c18f4e656..a31d8f155 100644
--- a/requirement-checker/composer.lock
+++ b/requirement-checker/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "fed43b102774195b129bf15f3aeb7a63",
+    "content-hash": "95d0fce24d70401c31ee9528248eebcb",
     "packages": [
         {
             "name": "composer/semver",
-            "version": "3.2.9",
+            "version": "3.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/semver.git",
-                "reference": "a951f614bd64dcd26137bc9b7b2637ddcfc57649"
+                "reference": "3953f23262f2bff1919fc82183ad9acb13ff62c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/semver/zipball/a951f614bd64dcd26137bc9b7b2637ddcfc57649",
-                "reference": "a951f614bd64dcd26137bc9b7b2637ddcfc57649",
+                "url": "https://api.github.com/repos/composer/semver/zipball/3953f23262f2bff1919fc82183ad9acb13ff62c9",
+                "reference": "3953f23262f2bff1919fc82183ad9acb13ff62c9",
                 "shasum": ""
             },
             "require": {
@@ -69,7 +69,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/semver/issues",
-                "source": "https://github.com/composer/semver/tree/3.2.9"
+                "source": "https://github.com/composer/semver/tree/3.3.2"
             },
             "funding": [
                 {
@@ -85,35 +85,36 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-02-04T13:58:43+00:00"
+            "time": "2022-04-01T19:23:25+00:00"
         }
     ],
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
-            "version": "1.4.0",
+            "version": "1.4.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "d56bf6102915de5702778fe20f2de3b2fe570b5b"
+                "reference": "10dcfce151b967d20fde1b34ae6640712c3891bc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/d56bf6102915de5702778fe20f2de3b2fe570b5b",
-                "reference": "d56bf6102915de5702778fe20f2de3b2fe570b5b",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/10dcfce151b967d20fde1b34ae6640712c3891bc",
+                "reference": "10dcfce151b967d20fde1b34ae6640712c3891bc",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1 || ^8.0"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^8.0",
+                "doctrine/coding-standard": "^9",
                 "ext-pdo": "*",
                 "ext-phar": "*",
-                "phpbench/phpbench": "^0.13 || 1.0.0-alpha2",
-                "phpstan/phpstan": "^0.12",
-                "phpstan/phpstan-phpunit": "^0.12",
-                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0"
+                "phpbench/phpbench": "^0.16 || ^1",
+                "phpstan/phpstan": "^1.4",
+                "phpstan/phpstan-phpunit": "^1",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
+                "vimeo/psalm": "^4.22"
             },
             "type": "library",
             "autoload": {
@@ -140,7 +141,7 @@
             ],
             "support": {
                 "issues": "https://github.com/doctrine/instantiator/issues",
-                "source": "https://github.com/doctrine/instantiator/tree/1.4.0"
+                "source": "https://github.com/doctrine/instantiator/tree/1.4.1"
             },
             "funding": [
                 {
@@ -156,29 +157,33 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-11-10T18:47:58+00:00"
+            "time": "2022-03-03T08:28:38+00:00"
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.10.2",
+            "version": "1.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "776f831124e9c62e1a2c601ecc52e776d8bb7220"
+                "reference": "14daed4296fae74d9e3201d2c4925d1acb7aa614"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/776f831124e9c62e1a2c601ecc52e776d8bb7220",
-                "reference": "776f831124e9c62e1a2c601ecc52e776d8bb7220",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/14daed4296fae74d9e3201d2c4925d1acb7aa614",
+                "reference": "14daed4296fae74d9e3201d2c4925d1acb7aa614",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1 || ^8.0"
             },
+            "conflict": {
+                "doctrine/collections": "<1.6.8",
+                "doctrine/common": "<2.13.3 || >=3,<3.2.2"
+            },
             "require-dev": {
-                "doctrine/collections": "^1.0",
-                "doctrine/common": "^2.6",
-                "phpunit/phpunit": "^7.1"
+                "doctrine/collections": "^1.6.8",
+                "doctrine/common": "^2.13.3 || ^3.2.2",
+                "phpunit/phpunit": "^7.5.20 || ^8.5.23 || ^9.5.13"
             },
             "type": "library",
             "autoload": {
@@ -203,7 +208,7 @@
             ],
             "support": {
                 "issues": "https://github.com/myclabs/DeepCopy/issues",
-                "source": "https://github.com/myclabs/DeepCopy/tree/1.10.2"
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.11.0"
             },
             "funding": [
                 {
@@ -211,20 +216,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-11-13T09:40:50+00:00"
+            "time": "2022-03-03T13:19:32+00:00"
         },
         {
             "name": "nikic/php-parser",
-            "version": "v4.13.2",
+            "version": "v4.14.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "210577fe3cf7badcc5814d99455df46564f3c077"
+                "reference": "34bea19b6e03d8153165d8f30bba4c3be86184c1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/210577fe3cf7badcc5814d99455df46564f3c077",
-                "reference": "210577fe3cf7badcc5814d99455df46564f3c077",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/34bea19b6e03d8153165d8f30bba4c3be86184c1",
+                "reference": "34bea19b6e03d8153165d8f30bba4c3be86184c1",
                 "shasum": ""
             },
             "require": {
@@ -265,9 +270,9 @@
             ],
             "support": {
                 "issues": "https://github.com/nikic/PHP-Parser/issues",
-                "source": "https://github.com/nikic/PHP-Parser/tree/v4.13.2"
+                "source": "https://github.com/nikic/PHP-Parser/tree/v4.14.0"
             },
-            "time": "2021-11-30T19:35:32+00:00"
+            "time": "2022-05-31T20:59:12+00:00"
         },
         {
             "name": "phar-io/manifest",
@@ -331,16 +336,16 @@
         },
         {
             "name": "phar-io/version",
-            "version": "3.1.1",
+            "version": "3.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phar-io/version.git",
-                "reference": "15a90844ad40f127afd244c0cad228de2a80052a"
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phar-io/version/zipball/15a90844ad40f127afd244c0cad228de2a80052a",
-                "reference": "15a90844ad40f127afd244c0cad228de2a80052a",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
                 "shasum": ""
             },
             "require": {
@@ -376,9 +381,9 @@
             "description": "Library for handling version information and constraints",
             "support": {
                 "issues": "https://github.com/phar-io/version/issues",
-                "source": "https://github.com/phar-io/version/tree/3.1.1"
+                "source": "https://github.com/phar-io/version/tree/3.2.1"
             },
-            "time": "2022-02-07T21:56:48+00:00"
+            "time": "2022-02-21T01:04:05+00:00"
         },
         {
             "name": "phpdocumentor/reflection-common",
@@ -492,16 +497,16 @@
         },
         {
             "name": "phpdocumentor/type-resolver",
-            "version": "1.6.0",
+            "version": "1.6.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/TypeResolver.git",
-                "reference": "93ebd0014cab80c4ea9f5e297ea48672f1b87706"
+                "reference": "77a32518733312af16a44300404e945338981de3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/93ebd0014cab80c4ea9f5e297ea48672f1b87706",
-                "reference": "93ebd0014cab80c4ea9f5e297ea48672f1b87706",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/77a32518733312af16a44300404e945338981de3",
+                "reference": "77a32518733312af16a44300404e945338981de3",
                 "shasum": ""
             },
             "require": {
@@ -536,9 +541,9 @@
             "description": "A PSR-5 based resolver of Class names, Types and Structural Element Names",
             "support": {
                 "issues": "https://github.com/phpDocumentor/TypeResolver/issues",
-                "source": "https://github.com/phpDocumentor/TypeResolver/tree/1.6.0"
+                "source": "https://github.com/phpDocumentor/TypeResolver/tree/1.6.1"
             },
-            "time": "2022-01-04T19:58:01+00:00"
+            "time": "2022-03-15T21:29:03+00:00"
         },
         {
             "name": "phpspec/prophecy",
@@ -609,16 +614,16 @@
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "9.2.11",
+            "version": "9.2.15",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "665a1ac0a763c51afc30d6d130dac0813092b17f"
+                "reference": "2e9da11878c4202f97915c1cb4bb1ca318a63f5f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/665a1ac0a763c51afc30d6d130dac0813092b17f",
-                "reference": "665a1ac0a763c51afc30d6d130dac0813092b17f",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/2e9da11878c4202f97915c1cb4bb1ca318a63f5f",
+                "reference": "2e9da11878c4202f97915c1cb4bb1ca318a63f5f",
                 "shasum": ""
             },
             "require": {
@@ -674,7 +679,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.11"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.15"
             },
             "funding": [
                 {
@@ -682,7 +687,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2022-02-18T12:46:09+00:00"
+            "time": "2022-03-07T09:28:20+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -927,16 +932,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.5.14",
+            "version": "9.5.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "1883687169c017d6ae37c58883ca3994cfc34189"
+                "reference": "0e32b76be457de00e83213528f6bb37e2a38fcb1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/1883687169c017d6ae37c58883ca3994cfc34189",
-                "reference": "1883687169c017d6ae37c58883ca3994cfc34189",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/0e32b76be457de00e83213528f6bb37e2a38fcb1",
+                "reference": "0e32b76be457de00e83213528f6bb37e2a38fcb1",
                 "shasum": ""
             },
             "require": {
@@ -952,7 +957,7 @@
                 "phar-io/version": "^3.0.2",
                 "php": ">=7.3",
                 "phpspec/prophecy": "^1.12.1",
-                "phpunit/php-code-coverage": "^9.2.7",
+                "phpunit/php-code-coverage": "^9.2.13",
                 "phpunit/php-file-iterator": "^3.0.5",
                 "phpunit/php-invoker": "^3.1.1",
                 "phpunit/php-text-template": "^2.0.3",
@@ -966,11 +971,10 @@
                 "sebastian/global-state": "^5.0.1",
                 "sebastian/object-enumerator": "^4.0.3",
                 "sebastian/resource-operations": "^3.0.3",
-                "sebastian/type": "^2.3.4",
+                "sebastian/type": "^3.0",
                 "sebastian/version": "^3.0.2"
             },
             "require-dev": {
-                "ext-pdo": "*",
                 "phpspec/prophecy-phpunit": "^2.0.1"
             },
             "suggest": {
@@ -1014,7 +1018,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.14"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.21"
             },
             "funding": [
                 {
@@ -1026,7 +1030,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2022-02-18T12:54:07+00:00"
+            "time": "2022-06-19T12:14:25+00:00"
         },
         {
             "name": "sebastian/cli-parser",
@@ -1394,16 +1398,16 @@
         },
         {
             "name": "sebastian/environment",
-            "version": "5.1.3",
+            "version": "5.1.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/environment.git",
-                "reference": "388b6ced16caa751030f6a69e588299fa09200ac"
+                "reference": "1b5dff7bb151a4db11d49d90e5408e4e938270f7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/388b6ced16caa751030f6a69e588299fa09200ac",
-                "reference": "388b6ced16caa751030f6a69e588299fa09200ac",
+                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/1b5dff7bb151a4db11d49d90e5408e4e938270f7",
+                "reference": "1b5dff7bb151a4db11d49d90e5408e4e938270f7",
                 "shasum": ""
             },
             "require": {
@@ -1445,7 +1449,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/environment/issues",
-                "source": "https://github.com/sebastianbergmann/environment/tree/5.1.3"
+                "source": "https://github.com/sebastianbergmann/environment/tree/5.1.4"
             },
             "funding": [
                 {
@@ -1453,7 +1457,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-09-28T05:52:38+00:00"
+            "time": "2022-04-03T09:37:03+00:00"
         },
         {
             "name": "sebastian/exporter",
@@ -1885,28 +1889,28 @@
         },
         {
             "name": "sebastian/type",
-            "version": "2.3.4",
+            "version": "3.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/type.git",
-                "reference": "b8cd8a1c753c90bc1a0f5372170e3e489136f914"
+                "reference": "b233b84bc4465aff7b57cf1c4bc75c86d00d6dad"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/b8cd8a1c753c90bc1a0f5372170e3e489136f914",
-                "reference": "b8cd8a1c753c90bc1a0f5372170e3e489136f914",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/b233b84bc4465aff7b57cf1c4bc75c86d00d6dad",
+                "reference": "b233b84bc4465aff7b57cf1c4bc75c86d00d6dad",
                 "shasum": ""
             },
             "require": {
                 "php": ">=7.3"
             },
             "require-dev": {
-                "phpunit/phpunit": "^9.3"
+                "phpunit/phpunit": "^9.5"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.3-dev"
+                    "dev-master": "3.0-dev"
                 }
             },
             "autoload": {
@@ -1929,7 +1933,7 @@
             "homepage": "https://github.com/sebastianbergmann/type",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/type/issues",
-                "source": "https://github.com/sebastianbergmann/type/tree/2.3.4"
+                "source": "https://github.com/sebastianbergmann/type/tree/3.0.0"
             },
             "funding": [
                 {
@@ -1937,7 +1941,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-06-15T12:49:02+00:00"
+            "time": "2022-03-15T09:54:48+00:00"
         },
         {
             "name": "sebastian/version",
@@ -1992,88 +1996,6 @@
             ],
             "time": "2020-09-28T06:39:44+00:00"
         },
-        {
-            "name": "symfony/polyfill-ctype",
-            "version": "v1.24.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "30885182c981ab175d4d034db0f6f469898070ab"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/30885182c981ab175d4d034db0f6f469898070ab",
-                "reference": "30885182c981ab175d4d034db0f6f469898070ab",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.1"
-            },
-            "provide": {
-                "ext-ctype": "*"
-            },
-            "suggest": {
-                "ext-ctype": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-main": "1.23-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Ctype\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Gert de Pagter",
-                    "email": "BackEndTea@gmail.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill for ctype functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "ctype",
-                "polyfill",
-                "portable"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.24.0"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2021-10-20T20:35:02+00:00"
-        },
         {
             "name": "theseer/tokenizer",
             "version": "1.2.1",
@@ -2126,21 +2048,21 @@
         },
         {
             "name": "webmozart/assert",
-            "version": "1.10.0",
+            "version": "1.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozarts/assert.git",
-                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25"
+                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozarts/assert/zipball/6964c76c7804814a842473e0c8fd15bab0f18e25",
-                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/11cb2199493b2f8a3b53e7f19068fc6aac760991",
+                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2 || ^8.0",
-                "symfony/polyfill-ctype": "^1.8"
+                "ext-ctype": "*",
+                "php": "^7.2 || ^8.0"
             },
             "conflict": {
                 "phpstan/phpstan": "<0.12.20",
@@ -2178,9 +2100,9 @@
             ],
             "support": {
                 "issues": "https://github.com/webmozarts/assert/issues",
-                "source": "https://github.com/webmozarts/assert/tree/1.10.0"
+                "source": "https://github.com/webmozarts/assert/tree/1.11.0"
             },
-            "time": "2021-03-09T10:59:23+00:00"
+            "time": "2022-06-03T18:03:27+00:00"
         }
     ],
     "aliases": [],
@@ -2189,9 +2111,9 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.3",
+        "php": ">=7.2.5",
         "ext-phar": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.2.0"
+    "plugin-api-version": "2.3.0"
 }
diff --git a/requirement-checker/expected_terminal_diff b/requirement-checker/expected_terminal_diff
index 23b62141f..5b2a0ecea 100644
--- a/requirement-checker/expected_terminal_diff
+++ b/requirement-checker/expected_terminal_diff
@@ -4,6 +4,20 @@
  * For the full copyright and license information, please vie |	 * This source file is subject to the MIT license that is bun
  * file that was distributed with this source code.	      |	 * with this source code in the file LICENSE.
 namespace Symfony\Component\Console;			      |	namespace KevinGH\RequirementChecker;
+							      >	use function exec;
+							      >	use function fclose;
+							      >	use function fopen;
+							      >	use function function_exists;
+							      >	use function getenv;
+							      >	use function is_resource;
+							      >	use function preg_match;
+							      >	use function proc_close;
+							      >	use function proc_open;
+							      >	use function sapi_windows_vt100_support;
+							      >	use function stream_get_contents;
+							      >	use function trim;
+							      >	use const DIRECTORY_SEPARATOR;
+							      >
 							      >	/**
 							      >	 * This file is copy/pasted from the Symfony project to avoid
 							      >	 * class.
@@ -13,33 +27,17 @@ namespace Symfony\Component\Console;			      |	namespace KevinGH\RequirementChec
     private static ?int $width = null;			      |	    private static $width;
     private static ?int $height = null;			      |	    private static $height;
     private static ?bool $stty = null;			      |	    private static $stty;
-							      >	     *
-							      >	     * @return int
-    public function getWidth(): int			      |	    public function getWidth()
-							      >	     *
-							      >	     * @return int
-    public function getHeight(): int			      |	    public function getHeight()
-							      >	     *
-							      >	     * @return bool
-    public static function hasSttyAvailable(): bool	      |	    public static function hasSttyAvailable()
-    private static function hasVt100Support(): bool	      |	    private static function hasVt100Support()
-        return \function_exists('sapi_windows_vt100_support') |	        return \function_exists('sapi_windows_vt100_support')
-    /**							      <
+        if (null === self::$width) {			      |	        if (!isset(self::$width)) {
+        if (null === self::$height) {			      |	        if (!isset(self::$height)) {
+        if (null !== self::$stty) {			      |	        if (isset(self::$stty)) {
+        if (!\function_exists('exec')) {		      |	        if (!function_exists('exec')) {
+    private static function initDimensions()		      |	    private static function initDimensions(): void
+        if ('\\' === \DIRECTORY_SEPARATOR) {		      |	        if ('\\' === DIRECTORY_SEPARATOR) {
+        return \function_exists('sapi_windows_vt100_support') |	        return function_exists('sapi_windows_vt100_support') 
+    /**							      |	    private static function initDimensionsUsingStty(): void
      * Initializes dimensions using the output of an stty col <
      */							      <
-    private static function getConsoleMode(): ?array	      |	    private static function getConsoleMode()
+    private static function initDimensionsUsingStty()	      <
         return [(int) $matches[2], (int) $matches[1]];	      |	        return array((int) $matches[2], (int) $matches[1]);
-							      >	     *
-							      >	     * @return string|null
-    private static function getSttyColumns(): ?string	      |	    private static function getSttyColumns()
-    private static function readFromProcess(string $command): |	    /**
-							      >	     * @param string $command
-							      >	     *
-							      >	     * @return string|null
-							      >	     */
-							      >	    private static function readFromProcess($command)
-        $descriptorspec = [				      |	        $descriptorspec = array(
-            1 => ['pipe', 'w'],				      |	            1 => array('pipe', 'w'),
-            2 => ['pipe', 'w'],				      |	            2 => array('pipe', 'w'),
-        ];						      |	        );
-        $process = proc_open($command, $descriptorspec, $pipe |	        $process = proc_open($command, $descriptorspec, $pipe
+        if (!\function_exists('proc_open')) {		      |	        if (!function_exists('proc_open')) {
+        if (!\is_resource($process)) {			      |	        if (!is_resource($process)) {
diff --git a/requirement-checker/src/Checker.php b/requirement-checker/src/Checker.php
index b7e88ad7f..639c6fac8 100644
--- a/requirement-checker/src/Checker.php
+++ b/requirement-checker/src/Checker.php
@@ -24,10 +24,7 @@ final class Checker
     /** @var null|string */
     private static $requirementsConfig;
 
-    /**
-     * @return bool
-     */
-    public static function checkRequirements()
+    public static function checkRequirements(): bool
     {
         $requirements = self::retrieveRequirements();
 
@@ -47,7 +44,7 @@ public static function checkRequirements()
         return $checkPassed;
     }
 
-    public static function printCheck($checkPassed, Printer $printer, RequirementCollection $requirements)
+    public static function printCheck($checkPassed, Printer $printer, RequirementCollection $requirements): void
     {
         if (false === $checkPassed && IO::VERBOSITY_VERY_VERBOSE > $printer->getVerbosity()) {
             // Override the default verbosity to output errors regardless of the verbosity asked by the user
@@ -80,7 +77,7 @@ public static function printCheck($checkPassed, Printer $printer, RequirementCol
             $printer->printvln('> No requirements found.', $verbosity);
         }
 
-        $errorMessages = array();
+        $errorMessages = [];
 
         foreach ($requirements->getRequirements() as $requirement) {
             if ($errorMessage = $printer->getRequirementErrorMessage($requirement)) {
@@ -123,16 +120,13 @@ public static function printCheck($checkPassed, Printer $printer, RequirementCol
         $printer->printvln('', $verbosity);
     }
 
-    /**
-     * @return RequirementCollection
-     */
-    private static function retrieveRequirements()
+    private static function retrieveRequirements(): RequirementCollection
     {
         if (null === self::$requirementsConfig) {
             self::$requirementsConfig = __DIR__.'/../.requirements.php';
         }
 
-        /** @var array<string,string> $config */
+        /** @var list<array{type:string, condition:string, message:string, helpMessage:string}> $config */
         $config = require self::$requirementsConfig;
 
         $requirements = new RequirementCollection();
diff --git a/requirement-checker/src/IO.php b/requirement-checker/src/IO.php
index 9699e6ef7..f36b5a5e8 100644
--- a/requirement-checker/src/IO.php
+++ b/requirement-checker/src/IO.php
@@ -12,16 +12,29 @@
 
 namespace KevinGH\RequirementChecker;
 
+use function fstat;
+use function function_exists;
+use function getenv;
+use function implode;
+use function posix_isatty;
+use function preg_match;
+use function preg_quote;
+use function sapi_windows_vt100_support;
+use function sprintf;
+use function str_replace;
+use function stream_isatty;
+use const STDOUT;
+
 /**
  * @private
  */
 final class IO
 {
-    const VERBOSITY_QUIET = 16;
-    const VERBOSITY_NORMAL = 32;
-    const VERBOSITY_VERBOSE = 64;
-    const VERBOSITY_VERY_VERBOSE = 128;
-    const VERBOSITY_DEBUG = 256;
+    public const VERBOSITY_QUIET = 16;
+    public const VERBOSITY_NORMAL = 32;
+    public const VERBOSITY_VERBOSE = 64;
+    public const VERBOSITY_VERY_VERBOSE = 128;
+    public const VERBOSITY_DEBUG = 256;
 
     private $interactive;
     private $verbosity = self::VERBOSITY_NORMAL;
@@ -30,7 +43,7 @@ final class IO
 
     public function __construct()
     {
-        $this->options = \implode(' ', $_SERVER['argv']);
+        $this->options = implode(' ', $_SERVER['argv']);
 
         $shellVerbosity = $this->configureVerbosity();
 
@@ -38,37 +51,22 @@ public function __construct()
         $this->colorSupport = $this->checkColorSupport();
     }
 
-    /**
-     * @return bool
-     */
-    public function isInteractive()
+    public function isInteractive(): bool
     {
         return $this->interactive;
     }
 
-    /**
-     * @return int
-     */
-    public function getVerbosity()
+    public function getVerbosity(): int
     {
         return $this->verbosity;
     }
 
-    /**
-     * @return bool
-     */
-    public function hasColorSupport()
+    public function hasColorSupport(): bool
     {
         return $this->colorSupport;
     }
 
-    /**
-     * @param mixed
-     * @param mixed $values
-     *
-     * @return bool
-     */
-    public function hasParameter($values)
+    public function hasParameter($values): bool
     {
         $values = (array) $values;
 
@@ -86,24 +84,19 @@ public function hasParameter($values)
         return false;
     }
 
-    /**
-     * @param int $shellVerbosity
-     *
-     * @return bool
-     */
-    private function checkInteractivity($shellVerbosity)
+    private function checkInteractivity(int $shellVerbosity): bool
     {
         if (-1 === $shellVerbosity) {
             return false;
         }
 
-        if (true === $this->hasParameter(array('--no-interaction', '-n'))) {
+        if (true === $this->hasParameter(['--no-interaction', '-n'])) {
             return false;
         }
 
-        if (\function_exists('posix_isatty')
+        if (function_exists('posix_isatty')
             && !@posix_isatty(STDOUT)
-            && false === \getenv('SHELL_INTERACTIVE')
+            && false === getenv('SHELL_INTERACTIVE')
         ) {
             return false;
         }
@@ -111,10 +104,7 @@ private function checkInteractivity($shellVerbosity)
         return true;
     }
 
-    /**
-     * @return int
-     */
-    private function configureVerbosity()
+    private function configureVerbosity(): int
     {
         switch ($shellVerbosity = (int) getenv('SHELL_VERBOSITY')) {
             case -1:
@@ -134,16 +124,16 @@ private function configureVerbosity()
                 break;
         }
 
-        if ($this->hasParameter(array('--quiet', '-q'))) {
+        if ($this->hasParameter(['--quiet', '-q'])) {
             $this->verbosity = self::VERBOSITY_QUIET;
             $shellVerbosity = -1;
-        } elseif ($this->hasParameter(array('-vvv', '--verbose=3', '--verbose 3'))) {
+        } elseif ($this->hasParameter(['-vvv', '--verbose=3', '--verbose 3'])) {
             $this->verbosity = self::VERBOSITY_DEBUG;
             $shellVerbosity = 3;
-        } elseif ($this->hasParameter(array('-vv', '--verbose=2', '--verbose 2'))) {
+        } elseif ($this->hasParameter(['-vv', '--verbose=2', '--verbose 2'])) {
             $this->verbosity = self::VERBOSITY_VERY_VERBOSE;
             $shellVerbosity = 2;
-        } elseif ($this->hasParameter(array('-v', '--verbose=1', '--verbose 1', '--verbose'))) {
+        } elseif ($this->hasParameter(['-v', '--verbose=1', '--verbose 1', '--verbose'])) {
             $this->verbosity = self::VERBOSITY_VERBOSE;
             $shellVerbosity = 1;
         }
@@ -165,19 +155,19 @@ private function configureVerbosity()
      *
      * @license MIT (c) Fabien Potencier <fabien@symfony.com>
      */
-    private function checkColorSupport()
+    private function checkColorSupport(): bool
     {
-        if ($this->hasParameter(array('--ansi'))) {
+        if ($this->hasParameter(['--ansi'])) {
             return true;
         }
 
-        if ($this->hasParameter(array('--no-ansi'))) {
+        if ($this->hasParameter(['--no-ansi'])) {
             return false;
         }
 
         if (\DIRECTORY_SEPARATOR === '\\') {
             return (
-                    \function_exists('sapi_windows_vt100_support')
+                    function_exists('sapi_windows_vt100_support')
                     && sapi_windows_vt100_support(STDOUT)
                 )
                 || false !== getenv('ANSICON')
@@ -185,11 +175,11 @@ private function checkColorSupport()
                 || 'xterm' === getenv('TERM');
         }
 
-        if (\function_exists('stream_isatty')) {
+        if (function_exists('stream_isatty')) {
             return stream_isatty(STDOUT);
         }
 
-        if (\function_exists('posix_isatty')) {
+        if (function_exists('posix_isatty')) {
             return posix_isatty(STDOUT);
         }
 
diff --git a/requirement-checker/src/IsExtensionFulfilled.php b/requirement-checker/src/IsExtensionFulfilled.php
index ef30a9ff4..5090cdfd5 100644
--- a/requirement-checker/src/IsExtensionFulfilled.php
+++ b/requirement-checker/src/IsExtensionFulfilled.php
@@ -12,6 +12,8 @@
 
 namespace KevinGH\RequirementChecker;
 
+use function extension_loaded;
+
 /**
  * @private
  */
@@ -19,19 +21,13 @@ final class IsExtensionFulfilled implements IsFulfilled
 {
     private $requiredExtension;
 
-    /**
-     * @param string $requiredExtension
-     */
-    public function __construct($requiredExtension)
+    public function __construct(string $requiredExtension)
     {
         $this->requiredExtension = $requiredExtension;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function __invoke()
+    public function __invoke(): bool
     {
-        return \extension_loaded($this->requiredExtension);
+        return extension_loaded($this->requiredExtension);
     }
 }
diff --git a/requirement-checker/src/IsFulfilled.php b/requirement-checker/src/IsFulfilled.php
index 2c5317815..674d276e9 100644
--- a/requirement-checker/src/IsFulfilled.php
+++ b/requirement-checker/src/IsFulfilled.php
@@ -17,8 +17,5 @@
  */
 interface IsFulfilled
 {
-    /**
-     * @return bool
-     */
-    public function __invoke();
+    public function __invoke(): bool;
 }
diff --git a/requirement-checker/src/IsPhpVersionFulfilled.php b/requirement-checker/src/IsPhpVersionFulfilled.php
index a7b80afcf..5fb564589 100644
--- a/requirement-checker/src/IsPhpVersionFulfilled.php
+++ b/requirement-checker/src/IsPhpVersionFulfilled.php
@@ -13,6 +13,7 @@
 namespace KevinGH\RequirementChecker;
 
 use Composer\Semver\Semver;
+use function sprintf;
 
 /**
  * @private
@@ -21,18 +22,12 @@ final class IsPhpVersionFulfilled implements IsFulfilled
 {
     private $requiredPhpVersion;
 
-    /**
-     * @param string $requiredPhpVersion
-     */
-    public function __construct($requiredPhpVersion)
+    public function __construct(string $requiredPhpVersion)
     {
         $this->requiredPhpVersion = $requiredPhpVersion;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function __invoke()
+    public function __invoke(): bool
     {
         return Semver::satisfies(
             sprintf('%d.%d.%d', \PHP_MAJOR_VERSION, \PHP_MINOR_VERSION, \PHP_RELEASE_VERSION),
diff --git a/requirement-checker/src/Printer.php b/requirement-checker/src/Printer.php
index b1e2081b8..8a4fb7615 100644
--- a/requirement-checker/src/Printer.php
+++ b/requirement-checker/src/Printer.php
@@ -12,12 +12,25 @@
 
 namespace KevinGH\RequirementChecker;
 
+use function array_shift;
+use function count;
+use function explode;
+use function ltrim;
+use function min;
+use function sprintf;
+use function str_pad;
+use function str_repeat;
+use function strlen;
+use function trim;
+use function wordwrap;
+use const PHP_EOL;
+
 /**
  * @private
  */
 final class Printer
 {
-    private $styles = array(
+    private $styles = [
         'reset' => "\033[0m",
         'red' => "\033[31m",
         'green' => "\033[32m",
@@ -25,17 +38,12 @@ final class Printer
         'title' => "\033[33m",
         'error' => "\033[37;41m",
         'success' => "\033[30;42m",
-    );
+    ];
     private $verbosity;
     private $supportColors;
     private $width;
 
-    /**
-     * @param int      $verbosity
-     * @param bool     $supportColors
-     * @param null|int $width
-     */
-    public function __construct($verbosity, $supportColors, $width = null)
+    public function __construct(int $verbosity, bool $supportColors, ?int $width = null)
     {
         if (null === $width) {
             $terminal = new Terminal();
@@ -47,28 +55,17 @@ public function __construct($verbosity, $supportColors, $width = null)
         $this->width = $width ?: 80;
     }
 
-    /**
-     * @return int
-     */
-    public function getVerbosity()
+    public function getVerbosity(): int
     {
         return $this->verbosity;
     }
 
-    /**
-     * @param int $verbosity
-     */
-    public function setVerbosity($verbosity)
+    public function setVerbosity($verbosity): void
     {
         $this->verbosity = $verbosity;
     }
 
-    /**
-     * @param string      $title
-     * @param int         $verbosity
-     * @param null|string $style
-     */
-    public function title($title, $verbosity, $style = null)
+    public function title(string $title, int $verbosity, ?string $style = null): void
     {
         if (null === $style) {
             $style = 'title';
@@ -79,7 +76,7 @@ public function title($title, $verbosity, $style = null)
         $this->printvln(
             str_repeat(
                 '=',
-                min(\strlen($title), $this->width)
+                min(strlen($title), $this->width)
             ),
             $verbosity,
             $style
@@ -87,29 +84,16 @@ public function title($title, $verbosity, $style = null)
         $this->printvln('', $verbosity, $style);
     }
 
-    /**
-     * @param Requirement $requirement
-     *
-     * @return null|string
-     */
-    public function getRequirementErrorMessage(Requirement $requirement)
+    public function getRequirementErrorMessage(Requirement $requirement): ?string
     {
         if ($requirement->isFulfilled()) {
             return null;
         }
 
-        $errorMessage = wordwrap($requirement->getTestMessage(), $this->width - 3, PHP_EOL.'   ').PHP_EOL;
-
-        return $errorMessage;
+        return wordwrap($requirement->getTestMessage(), $this->width - 3, PHP_EOL.'   ').PHP_EOL;
     }
 
-    /**
-     * @param string      $title
-     * @param string      $message
-     * @param int         $verbosity
-     * @param null|string $style
-     */
-    public function block($title, $message, $verbosity, $style = null)
+    public function block(string $title, string $message, int $verbosity, ?string $style = null): void
     {
         $prefix = ' ['.$title.'] ';
         $lineLength = $this->width - strlen($prefix) - 1;
@@ -118,7 +102,7 @@ public function block($title, $message, $verbosity, $style = null)
         }
         $message = $prefix.trim($message);
 
-        $lines = array();
+        $lines = [];
 
         $remainingMessage = $message;
 
@@ -128,7 +112,7 @@ public function block($title, $message, $verbosity, $style = null)
         do {
             $line = array_shift($wrapped);
             if ($lines && $lineLength > 0) {
-                $line = str_repeat(' ', \strlen($prefix)).ltrim($line);
+                $line = str_repeat(' ', strlen($prefix)).ltrim($line);
             }
             $lines[] = str_pad($line, $this->width, ' ', STR_PAD_RIGHT);
         }
@@ -143,23 +127,13 @@ public function block($title, $message, $verbosity, $style = null)
         $this->printvln('', $verbosity);
     }
 
-    /**
-     * @param string      $message
-     * @param int         $verbosity
-     * @param null|string $style
-     */
-    public function printvln($message, $verbosity, $style = null)
+    public function printvln(string $message, int $verbosity, ?string $style = null): void
     {
         $this->printv($message, $verbosity, $style);
         $this->printv(PHP_EOL, $verbosity, null);
     }
 
-    /**
-     * @param string      $message
-     * @param int         $verbosity
-     * @param null|string $style
-     */
-    public function printv($message, $verbosity, $style = null)
+    public function printv(string $message, int $verbosity, ?string $style = null): void
     {
         if ($verbosity > $this->verbosity) {
             return;
diff --git a/requirement-checker/src/Requirement.php b/requirement-checker/src/Requirement.php
index 453922cf9..8c5d0caa1 100644
--- a/requirement-checker/src/Requirement.php
+++ b/requirement-checker/src/Requirement.php
@@ -26,53 +26,36 @@ final class Requirement
     private $testMessage;
     private $helpText;
 
-    /**
-     * @param IsFulfilled $checkIsFulfilled
-     * @param string      $testMessage
-     * @param string      $helpText
-     */
     public function __construct(
-        $checkIsFulfilled,
-        $testMessage,
-        $helpText
+        IsFulfilled $checkIsFulfilled,
+        string $testMessage,
+        string $helpText
     ) {
         $this->checkIsFulfilled = $checkIsFulfilled;
         $this->testMessage = $testMessage;
         $this->helpText = $helpText;
     }
 
-    /**
-     * @return bool
-     */
-    public function isFulfilled()
+    public function isFulfilled(): bool
     {
-        if (null === $this->fulfilled) {
+        if (!isset($this->fulfilled)) {
             $this->fulfilled = $this->checkIsFulfilled->__invoke();
         }
 
-        return (bool) $this->fulfilled;  // Cast to boolean, `(bool)` and `boolval()` are not available in PHP 5.3
+        return $this->fulfilled;
     }
 
-    /**
-     * @return IsFulfilled
-     */
-    public function getIsFullfilledChecker()
+    public function getIsFullfilledChecker(): IsFulfilled
     {
         return $this->checkIsFulfilled;
     }
 
-    /**
-     * @return string
-     */
-    public function getTestMessage()
+    public function getTestMessage(): string
     {
         return $this->testMessage;
     }
 
-    /**
-     * @return string
-     */
-    public function getHelpText()
+    public function getHelpText(): string
     {
         return $this->helpText;
     }
diff --git a/requirement-checker/src/RequirementCollection.php b/requirement-checker/src/RequirementCollection.php
index 0163665bf..4332f1e12 100644
--- a/requirement-checker/src/RequirementCollection.php
+++ b/requirement-checker/src/RequirementCollection.php
@@ -15,8 +15,9 @@
 use ArrayIterator;
 use Countable;
 use IteratorAggregate;
-use ReturnTypeWillChange;
 use Traversable;
+use function count;
+use function get_cfg_var;
 
 /**
  * @private
@@ -28,34 +29,27 @@
 final class RequirementCollection implements IteratorAggregate, Countable
 {
     /**
-     * @var Requirement[]
+     * @var list<Requirement>
      */
-    private $requirements = array();
+    private $requirements = [];
 
     /**
-     * {@inheritdoc}
-     *
-     * @return Requirement[]|Traversable
+     * @return Traversable<Requirement>
      */
-    #[ReturnTypeWillChange]
-    public function getIterator()
+    public function getIterator(): Traversable
     {
         return new ArrayIterator($this->requirements);
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    #[ReturnTypeWillChange]
-    public function count()
+    public function count(): int
     {
-        return \count($this->requirements);
+        return count($this->requirements);
     }
 
     /**
      * @param Requirement $requirement
      */
-    public function add(Requirement $requirement)
+    public function add(Requirement $requirement): void
     {
         $this->requirements[] = $requirement;
     }
@@ -68,7 +62,7 @@ public function add(Requirement $requirement)
      * @param string      $testMessage      The message for testing the requirement
      * @param string      $helpText         The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      */
-    public function addRequirement($checkIsFulfilled, $testMessage, $helpText)
+    public function addRequirement(IsFulfilled $checkIsFulfilled, string $testMessage, string $helpText): void
     {
         $this->add(new Requirement($checkIsFulfilled, $testMessage, $helpText));
     }
@@ -76,9 +70,9 @@ public function addRequirement($checkIsFulfilled, $testMessage, $helpText)
     /**
      * Returns all mandatory requirements.
      *
-     * @return Requirement[]
+     * @return list<Requirement>
      */
-    public function getRequirements()
+    public function getRequirements(): array
     {
         return $this->requirements;
     }
@@ -100,13 +94,7 @@ public function evaluateRequirements()
     {
         return array_reduce(
             $this->requirements,
-            /**
-             * @param bool        $checkPassed
-             * @param Requirement $requirement
-             *
-             * @return bool
-             */
-            function ($checkPassed, Requirement $requirement) {
+            function (bool $checkPassed, Requirement $requirement): bool {
                 return $checkPassed && $requirement->isFulfilled();
             },
             true
diff --git a/requirement-checker/src/Terminal.php b/requirement-checker/src/Terminal.php
index 7335452d1..aa0e695f6 100644
--- a/requirement-checker/src/Terminal.php
+++ b/requirement-checker/src/Terminal.php
@@ -12,6 +12,20 @@
 
 namespace KevinGH\RequirementChecker;
 
+use function exec;
+use function fclose;
+use function fopen;
+use function function_exists;
+use function getenv;
+use function is_resource;
+use function preg_match;
+use function proc_close;
+use function proc_open;
+use function sapi_windows_vt100_support;
+use function stream_get_contents;
+use function trim;
+use const DIRECTORY_SEPARATOR;
+
 /**
  * This file is copy/pasted from the Symfony project to avoid a dependency on `symfony/console` which would be too big for just using this
  * class.
@@ -26,17 +40,15 @@ class Terminal
 
     /**
      * Gets the terminal width.
-     *
-     * @return int
      */
-    public function getWidth()
+    public function getWidth(): int
     {
         $width = getenv('COLUMNS');
         if (false !== $width) {
             return (int) trim($width);
         }
 
-        if (null === self::$width) {
+        if (!isset(self::$width)) {
             self::initDimensions();
         }
 
@@ -45,17 +57,15 @@ public function getWidth()
 
     /**
      * Gets the terminal height.
-     *
-     * @return int
      */
-    public function getHeight()
+    public function getHeight(): int
     {
         $height = getenv('LINES');
         if (false !== $height) {
             return (int) trim($height);
         }
 
-        if (null === self::$height) {
+        if (!isset(self::$height)) {
             self::initDimensions();
         }
 
@@ -64,17 +74,15 @@ public function getHeight()
 
     /**
      * @internal
-     *
-     * @return bool
      */
-    public static function hasSttyAvailable()
+    public static function hasSttyAvailable(): bool
     {
-        if (null !== self::$stty) {
+        if (isset(self::$stty)) {
             return self::$stty;
         }
 
         // skip check if exec function is disabled
-        if (!\function_exists('exec')) {
+        if (!function_exists('exec')) {
             return false;
         }
 
@@ -83,9 +91,9 @@ public static function hasSttyAvailable()
         return self::$stty = 0 === $exitcode;
     }
 
-    private static function initDimensions()
+    private static function initDimensions(): void
     {
-        if ('\\' === \DIRECTORY_SEPARATOR) {
+        if ('\\' === DIRECTORY_SEPARATOR) {
             if (preg_match('/^(\d+)x(\d+)(?: \((\d+)x(\d+)\))?$/', trim(getenv('ANSICON')), $matches)) {
                 // extract [w, H] from "wxh (WxH)"
                 // or [w, h] from "wxh"
@@ -108,12 +116,12 @@ private static function initDimensions()
     /**
      * Returns whether STDOUT has vt100 support (some Windows 10+ configurations).
      */
-    private static function hasVt100Support()
+    private static function hasVt100Support(): bool
     {
-        return \function_exists('sapi_windows_vt100_support') && \sapi_windows_vt100_support(\fopen('php://stdout', 'wb'));
+        return function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(fopen('php://stdout', 'wb'));
     }
 
-    private static function initDimensionsUsingStty()
+    private static function initDimensionsUsingStty(): void
     {
         if ($sttyString = self::getSttyColumns()) {
             if (preg_match('/rows.(\d+);.columns.(\d+);/i', $sttyString, $matches)) {
@@ -133,7 +141,7 @@ private static function initDimensionsUsingStty()
      *
      * @return int[]|null An array composed of the width and the height or null if it could not be parsed
      */
-    private static function getConsoleMode()
+    private static function getConsoleMode(): ?array
     {
         $info = self::readFromProcess('mode CON');
 
@@ -146,32 +154,25 @@ private static function getConsoleMode()
 
     /**
      * Runs and parses stty -a if it's available, suppressing any error output.
-     *
-     * @return string|null
      */
-    private static function getSttyColumns()
+    private static function getSttyColumns(): ?string
     {
         return self::readFromProcess('stty -a | grep columns');
     }
 
-    /**
-     * @param string $command
-     *
-     * @return string|null
-     */
-    private static function readFromProcess($command)
+    private static function readFromProcess(string $command): ?string
     {
-        if (!\function_exists('proc_open')) {
+        if (!function_exists('proc_open')) {
             return null;
         }
 
-        $descriptorspec = array(
-            1 => array('pipe', 'w'),
-            2 => array('pipe', 'w'),
-        );
+        $descriptorspec = [
+            1 => ['pipe', 'w'],
+            2 => ['pipe', 'w'],
+        ];
 
-        $process = proc_open($command, $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
-        if (!\is_resource($process)) {
+        $process = proc_open($command, $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);
+        if (!is_resource($process)) {
             return null;
         }
 
diff --git a/requirement-checker/tests/CheckerTest.php b/requirement-checker/tests/CheckerTest.php
index 6e96f54c1..cdb3ad5c6 100644
--- a/requirement-checker/tests/CheckerTest.php
+++ b/requirement-checker/tests/CheckerTest.php
@@ -133,7 +133,7 @@ public function provideRequirements(): Generator
             );
             $requirements->addRequirement(
                 new class implements IsFulfilled {
-                    public function __invoke()
+                    public function __invoke(): bool
                     {
                         return true;
                     }
diff --git a/requirement-checker/tests/ConditionIsFulfilled.php b/requirement-checker/tests/ConditionIsFulfilled.php
index 0a3fea52d..5668076c6 100644
--- a/requirement-checker/tests/ConditionIsFulfilled.php
+++ b/requirement-checker/tests/ConditionIsFulfilled.php
@@ -6,11 +6,8 @@
 
 final class ConditionIsFulfilled implements IsFulfilled
 {
-    /**
-     * {@inheritdoc}
-     */
     public function __invoke(): bool
     {
         return true;
     }
-}
\ No newline at end of file
+}
diff --git a/requirement-checker/tests/ConditionIsNotFulfilled.php b/requirement-checker/tests/ConditionIsNotFulfilled.php
index 8a55a08f4..f304cf9b1 100644
--- a/requirement-checker/tests/ConditionIsNotFulfilled.php
+++ b/requirement-checker/tests/ConditionIsNotFulfilled.php
@@ -6,11 +6,8 @@
 
 final class ConditionIsNotFulfilled implements IsFulfilled
 {
-    /**
-     * {@inheritdoc}
-     */
     public function __invoke(): bool
     {
         return false;
     }
-}
\ No newline at end of file
+}
diff --git a/requirement-checker/tests/IOTest.php b/requirement-checker/tests/IOTest.php
index 51c8ca03c..27ff5aef4 100644
--- a/requirement-checker/tests/IOTest.php
+++ b/requirement-checker/tests/IOTest.php
@@ -17,7 +17,6 @@
 use Generator;
 use function function_exists;
 use function getenv;
-use function in_array;
 use PHPUnit\Framework\TestCase;
 use function posix_isatty;
 use function putenv;
diff --git a/requirement-checker/tests/RequirementTest.php b/requirement-checker/tests/RequirementTest.php
index c3e14df0d..497a185a2 100644
--- a/requirement-checker/tests/RequirementTest.php
+++ b/requirement-checker/tests/RequirementTest.php
@@ -41,7 +41,7 @@ public function test_it_evaluates_the_check_lazily(): void
     {
         $requirement = new Requirement(
             $check = new class implements IsFulfilled {
-                public function __invoke()
+                public function __invoke(): bool
                 {
                     throw new Error();
                 }
@@ -61,66 +61,18 @@ public function __invoke()
         }
     }
 
-    public function test_it_casts_the_fulfilled_result_into_a_boolean(): void
-    {
-        $requirement = new Requirement(
-            new class implements IsFulfilled {
-                public function __invoke()
-                {
-                    return 1;
-                }
-            },
-            '',
-            ''
-        );
-
-        $this->assertTrue($requirement->isFulfilled());
-
-        $requirement = new Requirement(
-            new class implements IsFulfilled {
-                public function __invoke()
-                {
-                    return 0;
-                }
-            },
-            '',
-            ''
-        );
-
-        $this->assertFalse($requirement->isFulfilled());
-
-        $requirement = new Requirement(
-            new class implements IsFulfilled {
-                public function __invoke()
-                {
-                    return new stdClass();
-                }
-            },
-            '',
-            ''
-        );
-
-        $this->assertTrue($requirement->isFulfilled());
-    }
-
     public function test_it_evaluates_the_check_only_once(): void
     {
-        $x = -1;
-
         $requirement = new Requirement(
-            new class($x) implements IsFulfilled {
-                private $x;
-
-                public function __construct(&$x)
-                {
-                    $this->x = $x;
-                }
+            new class() implements IsFulfilled {
+                private bool $calledOnce = false;
 
-                public function __invoke()
+                public function __invoke(): bool
                 {
-                    $this->x++;
+                    $result = $this->calledOnce;
+                    $this->calledOnce = true;
 
-                    return $this->x;
+                    return $result;
                 }
             },
             'Test message',
@@ -128,6 +80,6 @@ public function __invoke()
         );
 
         $this->assertFalse($requirement->isFulfilled());
-        $this->assertFalse($requirement->isFulfilled());    // Would have gave `true` if it was evaluated a second time
+        $this->assertFalse($requirement->isFulfilled());    // Would have given `true` if it was evaluated a second time
     }
 }