language: ruby
sudo: false
cache: bundler
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.0
script:
  - bundle exec rake test

language: ruby
sudo: false
cache: bundler
rvm:
  - 2.0.0
  - 2.1.0
  - 2.2.0
script:
  - bundle exec rake test

Remove ruby < 2 support
Remove ruby < 2 support