language: ruby
cache: bundler
sudo: false
rvm:
  - 2.3
  - 2.4
  - 2.5
  - 2.6
notifications:
  email: false

language: ruby
cache: bundler
sudo: false
rvm:
  - 2.3
  - 2.4
  - 2.5
  - 2.6
before_install:
  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
  - gem install bundler -v '< 2'
notifications:
  email: false

Use Bundler 1.x on Travis CI
Use Bundler 1.x on Travis CI

It is required by the gem, at least for the time being.
