.travis.yml in polishgeeks-dev-tools-1.2.1 vs .travis.yml in polishgeeks-dev-tools-1.3.0

@@ -1,6 +1,7 @@
 language: ruby
 rvm:
-  - 2.1.7
-  - 2.2.3
+  - 2.1.8
+  - 2.2.4
+  - 2.3.0
 script:
   - bundle exec rake