Upstream changes:
12.1.0:
http://www.unicode.org/versions/Unicode12.1.0/
Unicode 12.1 adds exactly one character, for a total of 137,929 characters.
The new character added to Version 12.1 is:
* U+32FF SQUARE ERA NAME REIWA
Version 12.1 adds that single character to enable software to be
rapidly updated to support the new Japanese era name in calendrical
systems and date formatting. The new Japanese era name was officially
announced on April 1, 2019, and is effective as of May 1, 2019.
12.0.0:
http://www.unicode.org/versions/Unicode12.0.0/
Unicode 12.0 adds 554 characters, for a total of 137,928 characters.
These additions include 4 new scripts, for a total of 150 scripts,
as well as 61 new emoji characters.
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.
The Unicode Character Database (UCD) consists of a number of data files
listing Unicode character properties and related data. It also includes
data files containing test data for conformance to several important
Unicode algorithms. Full documentation for the UCD can be found in
Unicode Standard Annex #44, Unicode Character Database.
http://www.unicode.org/reports/tr44/
These data files are required by the latest ibus-1.5.18.