language: ruby
cache: bundler
rvm:
 - "2.2.2"
 - "2.3.1"
script: bundle exec rake spec

language: ruby
cache: bundler
rvm:
 - "2.2.2"
 - "2.3.3"
 - "2.4.0"
script: bundle exec rake spec

Update list of supported ruby versions
Update list of supported ruby versions
