.travis.yml in cookbook-omnifetch-0.5.1 vs .travis.yml in cookbook-omnifetch-0.6.0

@@ -2,10 +2,10 @@
   only:
     master
 
 language: ruby
 rvm:
-  - 2.1
   - 2.2
-  - 2.3.1
-before_install: gem install bundler -v 1.11.2
+  - 2.3.3
+  - 2.4.1
+before_install: gem install bundler -v 1.14.6
 script: bundle exec rake ci