sudo: false
language: ruby
rvm:
  - 2.1.8
  - 2.2.5
  - 2.3.1
before_install: gem install bundler -v 1.13.2
bundler_args: --without local

sudo: false
language: ruby
rvm:
  - 2.1.8
  - 2.2.5
  - 2.3.3
  - 2.4.0
before_install: gem install bundler -v 1.13.7
bundler_args: --without local

Test against Ruby 2.3.3 & 2.4.0
CI: Test against Ruby 2.3.3 & 2.4.0
