CI: Use actions/checkout@v4 #72

	name: CI

	on:
	- push
	- pull_request

	jobs:
	test:
	strategy:
	fail-fast: false
	matrix:
	os: [ ubuntu-latest, windows-latest ]
	rack-version: ['~> 2.0', '~> 3.0']
	ruby:
	- '2.3'
	- '2.4'
	- '2.5'
	- '2.6'
	- '2.7'
	- '3.0'
	- '3.1'
	- '3.2'
	- 'head'
	exclude:
	- ruby: '2.3'
	rack-version: '~> 3.0'
	runs-on: ${{ matrix.os }}
	env:
	RACK_VERSION: ${{ matrix.rack-version }}
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true
	- name: Run test
	run: bundle exec rake test

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