.travis.yml in simple-navigation-4.0.4 vs .travis.yml in simple-navigation-4.0.5

@@ -1,11 +1,10 @@
 before_install:
   - gem install bundler
 
 rvm:
-  - 2.0.0
-  - 2.1.5
-  - 2.2.1
+  - 2.2.6
+  - 2.3.3
 
 gemfile:
   - gemfiles/rails-4-2-stable.gemfile
   - gemfiles/rails-4-1-stable.gemfile
   - gemfiles/rails-3-2-stable.gemfile