Run tests against ruby 2.2.3

Braintree supports Ruby 2.2.3 for applications, and it seems generally easier to test against 2.2.3 as well as old versions, to make sure changes to Litmus don't break on BT-supported ruby versions.
sleepdeprecation · Mar 29, 2017 · cc1d3e9 · cc1d3e9
1 parent 355a894
commit cc1d3e9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ language: ruby
 rvm:
 - 1.9.3
 - 2.0.0
+- 2.2.3
 sudo: false
 notifications:
   email: