.travis.yml in omniauth-auth0-1.4.2 vs .travis.yml in omniauth-auth0-2.0.0

@@ -1,3 +1,6 @@
 language: ruby
 rvm:
-  - 2.1.0
\ No newline at end of file
+- 2.2.5
+branches:
+  only:
+    - master