.travis.yml in critic-0.1.1 vs .travis.yml in critic-0.2.0

@@ -2,12 +2,10 @@
 sudo: false
 cache:
   - bundler
 rvm:
   - 2.3.0
-  - 2.2.4
-  - 2.1.8
 script: 
-  - bundle exec rubocop -D
+  - bundle exec rake rubocop
   - bundle exec rake spec
 notifications:
   email: false