.travis.yml in epo-ops-0.1.5 vs .travis.yml in epo-ops-0.1.6

@@ -1,5 +1,5 @@
 language: ruby
 rvm:
-  - "2.0.0"
-  - "2.1.0"
-  - "2.2.0"
\ No newline at end of file
+  - 2.2.7
+  - 2.3.4
+  - 2.4.1