sudo: require
language: ruby
rvm:
  - 2.3.3
  - 2.3.2
  - 2.3.1
  - 2.2.5
  - 2.2.4
  - 2.2.3
  - 2.2.2
  - 2.2.1
  - 2.2.0
before_install: gem install bundler -v 1.13.6