language: ruby
script : script/cibuild
cache: bundler
sudo: false

before_install:
  - gem update --system
  - bundle update
rvm:
  - 2.3
  - 2.4
  - 2.5
env:
  - ""
  - JEKYLL_VERSION=3.7.4

matrix:
  include:
    - # GitHub Pages
      rvm: 2.5.1
      env: GH_PAGES=true

language: ruby
script : script/cibuild
cache: bundler
sudo: false

before_install:
  - gem update --system
  - bundle update
rvm:
  - 2.4
  - 2.6
env:
  - ""
  - JEKYLL_VERSION=3.7.4

matrix:
  include:
    - # GitHub Pages
      rvm: 2.5.3
      env: GH_PAGES=true

Add Ruby 2.6, drop Ruby 2.3
chore(ci): Add Ruby 2.6, drop Ruby 2.3