Add 2.2.4 to TravisCI builds

bhornseth · bhornseth · commit c1cafaf2bff5 · 2017-01-19T20:08:15.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ language: ruby
 rvm:
   - 1.9.3
   - 2.1.6
+  - 2.2.4
 
 # Try to work around a travisCI quirk
 # see https://git.io/vVf62 for more
