.travis.yml in bitmask_attributes-0.4.0 vs .travis.yml in bitmask_attributes-1.0.0

@@ -1,4 +1,18 @@
 script: 'bundle exec rake test'
 language: ruby
 rvm:
   - 1.9.3
+  - 2.0.0
+
+gemfile:
+  - gemfiles/3.0.gemfile
+  - gemfiles/3.1.gemfile
+  - gemfiles/3.2.gemfile
+  - gemfiles/4.0.gemfile
+
+matrix:
+  exclude:
+    - rvm: 2.0.0
+      gemfile: gemfiles/3.0.gemfile
+    - rvm: 2.0.0
+      gemfile: gemfiles/3.1.gemfile