.travis.yml in can_be-0.3.0 vs .travis.yml in can_be-0.4.0

@@ -1,9 +1,16 @@
 language: ruby
 
 rvm:
+  - 2.0.0
   - 1.9.3
   - 1.9.2
 
 gemfile:
   - gemfiles/3.1.gemfile
   - gemfiles/3.2.gemfile
+  - gemfiles/4.0.gemfile
+
+matrix:
+  exclude:
+    rvm: 1.9.2
+    gemfile: gemfiles/4.0.gemfile