Added entry of psych 2.2.2

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57084 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2016-12-15 11:00:41 +00:00 · 2016-12-15 11:00:41 +00:00 · def2a2cb3f
--- a/4
+++ b/4
@ -314,6 +314,10 @@ with all sufficient information, see the ChangeLog file or Redmine
  * DateTime#to_time now preserves timezone.  [Bug #12189]
 * PSych
  * Update Psych 2.2.2
 * RDoc
  * Update RDoc 5.0.0