.travis.yml in gnawrnip-0.5.0 vs .travis.yml in gnawrnip-0.6.0

@@ -6,15 +6,15 @@
 branches:
   only:
     - master
 
 rvm:
-  - 2.1
-  - 2.2
+  - 2.2.2
   - 2.3.0
+  - 2.4.0
 
 script: bundle exec rspec
 
 gemfile:
-  - gemfiles/Gemfile-rspec-3.3.x
   - gemfiles/Gemfile-rspec-3.4.x
+  - gemfiles/Gemfile-rspec-3.5.x