Test the same Ruby interpreters as RuboCop.

htanata · htanata · commit ac4271a55872 · 2017-11-27T12:52:22.000-08:00
https://github.com/bbatsov/rubocop/blob/4a0d6361d0065ca16ba19bdf3b3d6c4623e14adc/.travis.yml#L6-L12 #7 (comment)
diff --git a/.travis.yml b/.travis.yml
@@ -1,10 +1,10 @@
 rvm:
+  - jruby-9.1.14.0
+  - jruby-head
   - 2.1.10
   - 2.2.8
   - 2.3.5
   - 2.4.2
-  - rbx-3
-  - ruby-head
 
 cache: bundler
 
