language: ruby
sudo: false
cache:
  directories:
    - ../bundle
rvm:
  - 1.9.2
  - 1.9.3
  - 2.0.0
  - 2.1
  - 2.2.7
  - 2.3.4
  - 2.4.1
  - ruby-head
branches:
  only:
    - master