language: ruby

rvm:
  - 1.9.2
  - 1.9.3
  - 2.0.0
  - 2.1.10
  - 2.2.9
  - 2.3.6
  - 2.4.3
  - 2.5.0

matrix:
  allow_failures:
    - rvm: 1.9.2
    - rvm: 1.9.3
    - rvm: 2.0.0
    - rvm: 2.1.10
    - rvm: 2.2.9

branches:
  only:
    - master

before_install:
  - gem install bundler