.travis.yml in sconb-1.0.0 vs .travis.yml in sconb-1.1.0

@@ -1,8 +1,11 @@
 language: ruby
 rvm:
-  - 2.1.2
+  - 2.1.10
+  - 2.2.4
+  - 2.3.0
 install:
   - gem install bundler
   - bundle install
 script:
   - bundle exec rake spec
+  - bundle exec rubocop