language: ruby
before_install:
  - find /home/travis/.rvm/rubies -wholename '*default/bundler-*.gemspec' -delete
  - gem install bundler -v $BUNDLER_VERSION
install: bundle _${BUNDLER_VERSION}_ install --jobs=3 --retry=3
script: bundle _${BUNDLER_VERSION}_ exec rake test
matrix:
  include:
    - rvm: 2.5
      env: BUNDLER_VERSION=1.16.1
    - rvm: 2.4
      env: BUNDLER_VERSION=1.16.1
    - rvm: 2.2
      env: BUNDLER_VERSION=1.12.1
    - rvm: 2.2
      env: BUNDLER_VERSION=1.12.1
    - rvm: 2.0
      env: BUNDLER_VERSION=1.12.1