.travis.yml in review-2.3.0 vs .travis.yml in review-2.4.0

@@ -8,10 +8,10 @@
 rvm:
   - 2.0
   - 2.1
   - 2.2
   - 2.3.3
-  - 2.4.0
+  - 2.4.1
 ##  - ruby-head
 
 branches:
   only:
     - master