.travis.yml in junoser-0.2.3 vs .travis.yml in junoser-0.2.4

@@ -1,10 +1,10 @@
 language: ruby
 
 rvm:
   - 2.1
   - 2.2
-  - 2.3.0
+  - 2.3.1
   - ruby-head
 
 before_install:
   - gem update bundler