.travis.yml in tcr-0.1.0 vs .travis.yml in tcr-0.1.1

@@ -2,7 +2,9 @@
 rvm:
   - "1.9.3"
   - "2.0.0"
   - "2.1.2"
   - "2.2.2"
-  - "2.3.0"
+  - "2.3.1"
+before_install:
+  - gem install bundler
 script: bundle exec rspec