language: ruby
rvm:
- 1.9.3
- 2.0.0
- 2.1.0
- 2.2.0
- 2.3.3
- 2.4.0
- 2.5.0
- ruby-head
cache: bundler
before_install:
- gem install bundler -v 1.17.3
matrix:
allow_failures:
- rvm: ruby-head
install:
- bundle install