Add a tap function #19

	name: CI

	on:
	# Run on all pushes and on all pull requests.
	push:
	pull_request:
	# Allow manually triggering the workflow.
	workflow_dispatch:

	jobs:
	test:
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	# Keys:
	# - experimental: Whether the build is "allowed to fail".
	matrix:
	php: ['7.1', '7.2', '7.3', '7.4', '8.0']
	experimental: [false]

	include:
	- php: '8.1'
	experimental: true

	name: "PHP: ${{ matrix.php }}"

	continue-on-error: ${{ matrix.experimental }}

	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Install PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}
	ini-values: error_reporting=-1, display_errors=On, log_errors_max_len=0
	coverage: none
	tools: composer

	# Install dependencies and handle caching in one go.
	# @link https://github.com/marketplace/actions/install-composer-dependencies
	- name: "Install Composer dependencies (PHP < 8.1)"
	if: ${{ matrix.php < '8.1' }}
	uses: "ramsey/composer-install@v2"

	- name: "Install Composer dependencies (PHP 8.1)"
	if: ${{ matrix.php >= '8.1' }}
	uses: "ramsey/composer-install@v2"
	with:
	composer-options: --ignore-platform-reqs

	- name: Run unit tests
	run: vendor/bin/phpunit

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