Update Travis build matrix

geoffharcourt · geoffharcourt · commit d90fee1766ca · 2017-10-06T13:51:31.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,4 +6,6 @@ cache:
 language:
   - ruby
 rvm:
-  - 2.2.2
+  - 2.2.8
+  - 2.3.5
+  - 2.4.2

-Original file line number
+Diff line change
 language:
   - ruby
 rvm:
 -  - 2.2.2
 +  - 2.2.8
 +  - 2.3.5
 +  - 2.4.2