.travis.yml in ivy-serializers-0.3.0 vs .travis.yml in ivy-serializers-0.4.0

@@ -1,9 +1,10 @@
 language: ruby
 
 rvm:
-  - 2.2.2
-  - 1.9.3
+  - 2.0
+  - 2.1
+  - 2.2
 
 cache: bundler
 
 notifications:
   email: