[ruby/prism] Update unicode tables to match that of CRuby

The unicode version has been updated upstream, which means new
codepoints mapped to alpha/alnum/isupper flags. We need to update
our tables to match.

I'm purposefully not adding a version check here, since that is
such a large amount of code. It's possible that we could include
different tables depending on a macro (like UNICODE_VERSION) or
something to that effect, but it's such a minimal impact on the
running of the actual parser that I don't think it's necessary.

ruby/prism@78925fe5b6

Author: kddnewton