language: ruby
rvm:
  - 2.3
  - 2.4
  - 2.5
  - 2.6
  - ruby-head
before_install:
  - gem install bundler
cache: bundler
sudo: false

matrix:
  allow_failures:
    - rvm: ruby-head

language: ruby
rvm:
  - 2.3
  - 2.4
  - 2.5
  - 2.6
  - ruby-head
before_install:
  - gem install bundler
cache: bundler

matrix:
  allow_failures:
    - rvm: ruby-head

Drop unused sudo: false directive
CI: Drop unused sudo: false directive

  - Blog post where they mention it is removed https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration