.gitignore
Fixed exponential number notation with capital E

`1e4` was recognized, but `1E4` wasn't.
Fixed "/" in character classes bugging out RegExps

/[/]?/ would previously resolve as [`/[/`, `?`, `/`].
String quote format ('/") is now preserved.

Previously '"Test"' could be converted into non-functional ""Test"".
Went unnoticed for longer than expected since Haxe never generates
JavaScript code with single-quoted strings in first place.
Updated binary.