add news about Unicode version update (issue #15321) to NEWS [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67173 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-03-06 03:15:06 +00:00 · 2019-03-06 03:15:06 +00:00 · b3f641085e
--- a/5
+++ b/5
@ -30,6 +30,11 @@ Enumerable::

   * Added Enumerable#tally.  [Feature #11076]

+Regexp/String::
+
+    * Update Unicode version and Emoji version from 11.0.0 to 12.0.0.
+      [Feature #15321]
+
 === Stdlib updates (outstanding ones only)

 CSV::