language: ruby
cache: bundler
sudo: false

rvm:
  - 2.2
  - 2.3.6
  - 2.4.3
  - 2.5.0

notifications:
  email: false

language: ruby
before_install: gem update --system
cache: bundler
sudo: false

rvm:
  - 2.2
  - 2.3.6
  - 2.4.3
  - 2.5.0

notifications:
  email: false

Fix Travis build on Ruby update
Fix Travis build on Ruby update