change regex to work with all allowed character

[GGAlanSmithee]

Right now, only a-zA-Z is allowed by the regexes.. This is incorrect.

• Find out exactly what set of characters is allowed in a CSS level 3 selector
• Change regex to work with all allowed characters

[GGAlanSmithee]

Looks as if maybe /^[\u10000-\uEFFFF]*$/ could be the accepted input range?

[GGAlanSmithee]

https://mathiasbynens.be/notes/javascript-encoding