.travis.yml in keep_up-0.7.0 vs .travis.yml in keep_up-0.7.1

@@ -8,9 +8,10 @@
 
 rvm:
   - 2.3
   - 2.4
   - 2.5
+  - 2.6
   - ruby-head
 
 matrix:
   allow_failures:
     - rvm: ruby-head