[FEA] Add regular expression support for new character classes introduced in Java 8

[andygrove]

Is your feature request related to a problem? Please describe.
Java 8 added support for the character classes \h, \H, \v\, \V, and \R

https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html

Describe the solution you'd like
We should add support for these character classes instead of falling back to CPU.

Describe alternatives you've considered
None

Additional context
None