Log Message:
unicode-character-database: update to 13.0.0.

Note the following two unicode-emoji files:
 emoji-data.txt
 emoji-variation-sequences.txt
have been moved from emoji dir (included in unicode-emoji package):
 https://unicode.org/Public/emoji/${EMOJI_VERSION}/
to ucd dir (included in unicode-character-database package):
 https://unicode.org/Public/${UCD_VERSION}/ucd/emoji/

Upstream changes:

13.0.0:
 http://www.unicode.org/versions/Unicode13.0.0/

 Unicode 13.0 adds 5,930 characters, for a total of 143,859 characters.
 These additions include 4 new scripts, for a total of 154 scripts,
 as well as 55 new emoji characters.