language: ruby
dist: trusty  # work at Ubuntu 14.04 for install Ruby 1.9.3
sudo: false
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.10
  - 2.2.10
  - 2.3.8
  - 2.4.10
  - 2.5.8
  - 2.6.6
  - 2.7.1
script:
    - rspec spec