.travis.yml in ikazuchi-0.1.4 vs .travis.yml in ikazuchi-0.1.5

@@ -1,7 +1,8 @@
 language: ruby
 rvm:
   - 2.0.0
   - 2.1.3
+  - 2.2.2
 script:
   - bundle exec rake spec
   - bundle exec rubocop