[ruby/irb] Version 1.2.2

https://github.com/ruby/irb/commit/a71753f15a

lib/irb/version.rb

@@ -11,7 +11,7 @@
 #
 
 module IRB # :nodoc:
-  VERSION = "1.2.1"
+  VERSION = "1.2.2"
   @RELEASE_VERSION = VERSION
-  @LAST_UPDATE_DATE = "2019-12-24"
+  @LAST_UPDATE_DATE = "2020-02-14"
 end