README.md in cliutils-2.1.0 vs README.md in cliutils-2.1.1

@@ -29,9 +29,18 @@
 ...along with plenty of documentation:
 
 * [Wiki](https://github.com/bachya/cliutils/wiki "CLIUtils Wiki")
 * [YARD documentation](http://rubydoc.info/github/bachya/cliutils/master/frames "YARD Documentation")
 
+# Compatibility
+
+CLIUtils is certified against the following:
+
+* Ruby 2.1.0
+* Ruby 2.0.0
+* Ruby 1.9.3
+* jruby-19mode
+
 # Installation
 
 Add this line to your application's Gemfile:
 
 ```bash