CIを整備して、古いRubyバージョンのサポートを落とした #2

	name: test

	on:
	push:
	branches:
	- main
	pull_request:
	types:
	- opened
	- synchronize
	- reopened

	jobs:
	test:
	runs-on: ubuntu-latest

	container: ${{ matrix.ruby }}

	strategy:
	fail-fast: false

	matrix:
	ruby-version: ['2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', 'head']
	include:
	- ruby-version: 'head'
	allow_failures: 'true'

	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true

	- name: Run test
	run: \|
	set -xe
	bundle exec rake
	continue-on-error: ${{ matrix.allow_failures == 'true' }}

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