.travis.yml in ey-hmac-2.1.0 vs .travis.yml in ey-hmac-2.2.0

@@ -1,7 +1,7 @@
 ---
 language: ruby
 rvm:
-  - 1.9.3
-  - 2.0.0
+  - 2.2
+  - 2.3
 
 script: bundle exec rspec