.travis.yml in chef-vault-2.2.4 vs .travis.yml in chef-vault-2.3.0

@@ -1,3 +1,7 @@
 language: ruby
 rvm:
-  - "1.9.3"
+  - "1.9.3-p547"
+  - "2.0.0-p576"
+  - "2.1.3"
+install: bundle install --binstubs
+env: TRAVIS_BUILD=true