.travis.yml in knife-ec2-0.13.0 vs .travis.yml in knife-ec2-0.14.0

@@ -7,8 +7,8 @@
   - gem update --system
   - gem install bundler
   - rm -f .bundle/config
 
 rvm:
-  - 2.1
-  - 2.2
-script: bundle exec rspec --color --format progress
+  - 2.2.5
+  - 2.3.1
+script: bundle exec rake spec