language: ruby
sudo: false
before_install:
  - gem install bundler -v '~> 1.13'
rvm:
  - 2.2.6
  - 2.3.3
  - 2.4.0
gemfile:
  - gemfiles/rails_5.0.gemfile

language: ruby
sudo: false
before_install:
  - gem update --system 2.6.9
  - gem install bundler -v '~> 1.14'
rvm:
  - 2.2.6
  - 2.3.3
  - 2.4.0
gemfile:
  - gemfiles/rails_5.0.gemfile

Use bundler 1.14 and gem 2.6.9
Use bundler 1.14 and gem 2.6.9