language: ruby
rvm:
  - 2.2.4
before_install: gem install bundler -v 1.11.2

language: ruby
rvm:
  - 2.2.4
  - 2.3.1
before_install: gem install bundler -v 1.11.2

Add ruby version 2.3.1 to CI
Add ruby version 2.3.1 to CI
