.travis.yml in trollolo-0.0.8 vs .travis.yml in trollolo-0.0.9

@@ -1,12 +1,12 @@
 language: ruby
 cache: bundler
 before_install:
-  - gem update --system
   - gem --version
+  - gem list bundler
 rvm:
-  - "2.1.7"
   - "2.2.3"
+  - "2.3.1"
 script: bundle exec rspec spec/unit
 sudo: false
 
 addons:
   code_climate: