use latest ruby version in CI

takkanm · jeremy · commit ddc85edb6c86 · 2017-05-08T22:17:58.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -11,9 +11,10 @@ rvm:
   - 1.9.2
   - 1.9.3
   - 2.0.0
-  - 2.1.9
-  - 2.2.5
-  - 2.3.1
+  - 2.1.10
+  - 2.2.7
+  - 2.3.4
+  - 2.4.1
   - ruby-head
   - jruby
   - jruby-9.0.5.0
