Update Unicode data to 14.0.0.

Change-Id: I376f415db92b684ddaa75dae17721e4d8f66a494
Reviewed-on: https://code-review.googlesource.com/c/re2/+/59372
Reviewed-by: Perry Lorier <perryl@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>
6 files changed