.travis.yml in dnc-0.1.9 vs .travis.yml in dnc-1.0.0

@@ -1,14 +1,14 @@
 language: ruby
 cache: bundler
 
 rvm:
-  - 2.4.1
-  - 2.3.4
-  - 2.2.7
-  - 2.0.0-p648
-  - 1.9.3-p551
+  - ruby-head
+  - 2.2.3
+  - 2.1.6
+  - 2.0.0
+  - 1.9.3
 
 before_install:
   - gem install bundler
 
-script: 'bundle exec rake spec'
+script: 'bundle exec rake'