sudo: false
language: ruby
cache: bundler
branches:
  only:
  - master
rvm:
  - 2.5
  - 2.4
  - 2.3
before_install:
  # https://github.com/travis-ci/travis-ci/issues/8978#issuecomment-354036443
  - gem update --system
  - gem install bundler

sudo: false
language: ruby
cache: bundler
branches:
  only:
  - master
rvm:
  - 2.6
  - 2.5
  - 2.4
  - 2.3
before_install:
  # https://github.com/travis-ci/travis-ci/issues/8978#issuecomment-354036443
  - gem update --system
  - gem install bundler

Test on 2.6 on Travis
Test on 2.6 on Travis
