.travis.yml in omniauth-google-oauth2-0.5.3 vs .travis.yml in omniauth-google-oauth2-0.5.4

- old
+ new

@@ -2,5 +2,6 @@
 rvm:
   - '2.1.10'
   - '2.2.7'
   - '2.3.4'
   - '2.4.1'
+  - '2.5.0'