language: ruby
sudo: false
rvm:
  - 2.3.3
  - 2.4.0
  - ruby-head
# uncomment this line if your project needs to run something other than `rake`:
# script: bundle exec rspec spec

language: ruby
sudo: false
rvm:
  - 2.2
  - 2.3
  - 2.4
  - 2.5
  - ruby-head

Test build against Ruby 2.2 and 2.5
[CI] Test build against Ruby 2.2 and 2.5