Support More Literals Inside Macros

[toddsundsted]

Macros don't seem to permit percent literals aside from % and %q. This PR adds support for %Q, %i, %w and %x.

See https://play.crystal-lang.org/#/r/9rgn

macro foo_bar
  %q|#{test}|
end
 
test = "hello, world"
puts foo_bar

Outputs "#{test}".

While https://play.crystal-lang.org/#/r/9rgo

macro foo_bar
  %Q|#{test}|
end
 
test = "hello, world"
puts foo_bar

Prints

There was a problem expanding macro 'foo_bar'


Called macro defined in eval:1:1

Which expanded to:

 > 1 | __temp_24|#{test}|
     ^
Error: unexpected token: EOF

I'd expect it to output "hello, world".

[asterite]

Looks great, thank you!