.travis.yml in json_test_data-0.3.0.beta vs .travis.yml in json_test_data-0.4.0.beta

@@ -1,10 +1,12 @@
 language: ruby
 rvm:
   - 2.1.8
-  - 2.2.2
+  - 2.2.4
   - 2.3.0
 sudo: false
+before_install:
+  - gem install regxing --version 0.1.0.beta
 branches:
   only:
     - master
 notifications:
   email: false