.travis.yml in dribbble-1.1.0 vs .travis.yml in dribbble-1.2.0

@@ -1,10 +1,11 @@
 sudo: false
 language: ruby
 
 cache: bundler
 rvm:
-  - 2.2.5
-  - 2.3.1
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0
 
 matrix:
   fast_finish: true