language: ruby
rvm:
  - 2.3
  - 2.4

notifications:
  email:
    on_success: change

language: ruby
rvm:
  - 2.3
  - 2.4
  - 2.5

notifications:
  email:
    on_success: change

Add Ruby 2.5 for Travis CI
Add Ruby 2.5 for Travis CI
