.travis.yml in ayadn-3.0 vs .travis.yml in ayadn-4.0

@@ -1,12 +1,9 @@
 language: ruby
 cache: bundler
 
 rvm:
-  - "2.2.3"
-  - "2.2.0"
-  - "2.1.0"
-  - "2.0.0"
+  - "2.3.0"
 
 script: 'bundle exec rake spec'
 
 branches:
   only: