language: ruby
rvm:
  - 2.2.7
  - 2.3.4
  - 2.4.1
  - ruby-head
script:
  - bundle exec rspec
notifications:
  email: false
matrix:
  allow_failures:
    - rvm: ruby-head

language: ruby
rvm:
  - 2.6.6
  - 2.7.1
  - ruby-head
script:
  - bundle exec rspec
notifications:
  email: false
matrix:
  allow_failures:
    - rvm: ruby-head

Update ruby versions which use in CI
Update ruby versions which use in CI
