.travis.yml in phaxio-0.5.0 vs .travis.yml in phaxio-2.0.0

@@ -1,10 +1,11 @@
 language: ruby
 
 rvm:
-  - 1.9.3
   - 2.0.0
   - 2.1
   - 2.2
+  - 2.3
+  - 2.4
   - jruby-19mode
 
 sudo: false