.travis.yml in infobar-0.4.0 vs .travis.yml in infobar-0.5.0

@@ -1,7 +1,8 @@
 rvm:
-  - 2.3.3
-  - 2.4.2
+  - 2.3
+  - 2.4
+  - 2.5
   - ruby-head
   - jruby-head
 sudo: false
 matrix:
   allow_failures: