language: ruby
rvm:
  - 2.1
  - 2.2.7
  - 2.3.4
  - 2.4.1
install:
  - bundler install --path vendor/bundle --jobs=3 --retry=3
script:
  - bundler exec rake

language: ruby
rvm:
  - 2.2.7
  - 2.3.4
  - 2.4.1
install:
  - bundler install --path vendor/bundle --jobs=3 --retry=3
script:
  - bundler exec rake

Remove support for Ruby 2.1
Remove support for Ruby 2.1
