language: ruby
rvm:
  - 2.0.0
  - 2.1.5
  - 2.2.4
  - 2.3.0
services:
  - redis-server
script: bundle exec rspec spec
sudo: false

language: ruby
rvm:
  - 2.0.0
  - 2.1.5
  - 2.2.4
  - 2.3.0
  - 2.4
  - 2.5
  - 2.6
services:
  - redis-server
script: bundle exec rspec spec
sudo: false

Add 2.4/5/6 supported ruby versions
Add 2.4/5/6 supported ruby versions
