deps: replace "nyc" with "c8"

Problem:
`nyc` is no longer maintained: istanbuljs/nyc#1514
and it depends on various outdated packages, .e.g `uuid@3.4.0` (check with `npm ls uuid`).

Solution:
- Remove `nyc`.
- Migrate to `c8`.

.c8rc.json

@@ -0,0 +1,20 @@
+{
+    "report-dir": "./coverage",
+    "reporter": ["lcov"],
+    "all": true,
+    "include": ["src/**", "dist/src/**"],
+    "exclude": [
+        "dist/src/test/**",
+        "dist/src/ssmDocument/**",
+        "dist/src/testE2E/**",
+        "dist/src/testLint/**",
+        "dist/src/testInteg/**",
+        "dist/src/testFixtures/**",
+        "src/test/**",
+        "src/ssmDocument/**",
+        "src/testE2E/**",
+        "src/testLint/**",
+        "src/testInteg/**",
+        "src/testFixtures/**"
+    ]
+}

.github/workflows/node.js.yml

@@ -42,7 +42,7 @@ jobs:
               uses: codecov/codecov-action@v3
               with:
                   verbose: true
-                  file: ./coverage/coverage-final.json
+                  file: ./coverage/lcov.info
                   flags: macos-unittests
             - name: Code coverage (CodeWhisperer)
               env:
@@ -52,7 +52,7 @@ jobs:
               uses: codecov/codecov-action@v3
               with:
                   verbose: true
-                  file: ./coverage/coverage-final.json
+                  file: ./coverage/lcov.info
                   flags: codewhisperer
 
     windows:
@@ -84,7 +84,7 @@ jobs:
               uses: codecov/codecov-action@v3
               with:
                   verbose: true
-                  file: ./coverage/coverage-final.json
+                  file: ./coverage/lcov.info
                   flags: windows-unittests
 
     lint:

.gitignore

@@ -2,7 +2,6 @@ out
 dist
 node_modules
 .vscode-test/
-.nyc_output/
 coverage/
 *.vsix
 *.bk