.travis.yml in extra_validations-0.1.0 vs .travis.yml in extra_validations-0.1.1

@@ -1,4 +1,7 @@
 language: ruby
 rvm:
+  - 2.0.0
+  - 2.1.0
   - 2.2.0
+  - ruby-head
 script: bundle exec rspec