language: ruby
cache: bundler
rvm:
  - 2.5
  - 2.7

before_install:
  - gem update --system
  - gem install bundler

script: script/cibuild

env:
  global:
    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
  matrix:
    - JEKYLL_VERSION="~> 3.9"
    - JEKYLL_VERSION="~> 4.0"