language: ruby
rvm:
  - 2.5
  - 2.6
  - 2.7
  - jruby
script: bundle exec rake spec

---
before_install:
  - gem update --system
  - gem install bundler -v "~> 2.0"
language: ruby
rvm:
  - 2.5
  - 2.6
  - 2.7
  - jruby
script: bundle exec rake spec

Make sure to install bundler 2.0 for older Rubies.
Make sure to install bundler 2.0 for older Rubies.
