version.rb in potassium-2.1.0

- old
+ new

@@ -1,5 +1,6 @@
 module Potassium
-  VERSION = "2.0.0"
+  VERSION = "2.1.0"
+  RUBY_VERSION = "2.3.1"
   RAILS_VERSION = "~> 4.2.0"
   RUBOCOP_VERSION = "~> 0.38.0"
 end