language: ruby
rvm:
  - "2.3.0"
  - "2.2.4"
  - "2.1.5"
  - "1.9.3"
  - "1.8.7"

language: ruby
before_install: gem install bundler
rvm:
  - "2.3.0"
  - "2.2.4"
  - "2.1.5"
  - "1.9.3"
  - "1.8.7"

Make sure to use an up-to-date bundler
[Travis] Make sure to use an up-to-date bundler
