.travis.yml in fastly-1.4.3 vs .travis.yml in fastly-1.5.0

@@ -1,7 +1,9 @@
 language: ruby
 script: 'bundle exec rake test:unit'
 sudo: false
 rvm:
-  - '1.9.3'
-  - '2.1.1'
-  - '2.3.0'
+  - 1.9.3
+  - 2.0.0
+  - 2.1.9
+  - 2.2.5
+  - 2.3.1