Support Unicode classes

[shimaore]

It would be nice to be able to use for example a Unicode-aware version of \w.

Currently this would mean that jison-lex needs to support more than caseless as an option, but I assume jison would need to offer an option for this as well?

[themaco]

Hi @shimaore did you ever get around this?

[shimaore]

Hi @themaco I suspect this change made the trick and should be available in @shimaore/jison.