Log Message:
unicode-character-database: update to 11.0.0.

No upstream changelog for UCD itself, but updated for new Unicode 11.0:
 http://blog.unicode.org/2018/06/announcing-unicode-standard-version-110.html.

Announcing The Unicode(R) Standard, Version 11.0

 Version 11.0 of the Unicode Standard is now available, both the core
 specification and data files.

 Version 11.0 adds 684 characters, for a total of 137,374 characters.
 These additions include seven new scripts, for a total of 146 scripts,
 as well as 145 new emoji.