language: ruby
os:
  - linux
  - osx

before_install:
  - gem install bundler -v 1.17.3

rvm:
  - 2.2
  - 2.6
  - ruby-head
  - jruby-head
  - truffleruby

matrix:
  allow_failures:
    - rvm: 2.2
      if: os = osx
    - rvm: ruby-head
    - rvm: jruby-head
    - rvm: truffleruby