.travis.yml in arison-0.1.3 vs .travis.yml in arison-0.2.0

@@ -1,15 +1,13 @@
 language: ruby
 
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1
-  - ruby-head
+  - 2.2.6
+  - 2.3.3
+  - 2.4.2
 
 os:
   - linux
-  - osx
 
 gemfile:
   - Gemfile
 
 script: 'bundle exec rake spec'