Test on Ruby 2.4.0

sds · sds · commit 898b9d2f8366 · 2017-03-18T19:29:01.000-07:00
Ruby 2.4.0 was released a few months ago. Add it to our build matrix.
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,7 @@ rvm:
   - 2.1
   - 2.2
   - 2.3.3
+  - 2.4.0
   - jruby-9.1.2.0
 
 before_script:
