.travis.yml in pagarme-2.0.2 vs .travis.yml in pagarme-2.1.0

@@ -1,5 +1,6 @@
 language: ruby
 rvm:
-  - "1.9.3"
   - "2.0.0"
-  - "2.1.2"
+  - "2.1.8"
+  - "2.2.4"
+  - "2.3.0"