add mention of upgrade to Unicode 10.0.0 to NEWS file
(this completes [Feature #13685]; [ci skip])
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
add mention of upgrade to Unicode 10.0.0 to NEWS file
(this completes [Feature #13685]; [ci skip])
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e