.travis.yml in ably-rest-1.0.5 vs .travis.yml in ably-rest-1.0.6

@@ -1,11 +1,14 @@
 sudo: false
 env: RSPEC_RETRY=true
 language: ruby
 rvm:
-- 1.9.3
-- 2.0.0
-- 2.2.0
+  - 1.9.3
+  - 2.0.0
+  - 2.1.10
+  - 2.2.0
+  - 2.3.6
+  - 2.4.1
 before_install:
   - git submodule update --init --recursive
 script: bundle exec rspec
 notifications:
   slack: