Replace deprecated set-output command. #153

	name: GitHub Actions

	on: [ push ]

	jobs:
	build:

	strategy:
	matrix:
	php-versions: [ 7.4 ]

	runs-on: ubuntu-latest

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

	- name: Get Composer cache directory
	id: composer-cache
	run: echo "{dir}={$(composer config cache-files-dir)}" >> $GITHUB_OUTPUT

	- name: Setup Composer caching
	uses: actions/cache@v3
	env:
	cache-name: cache-composer-dependencies
	with:
	path: ${{ steps.composer-cache.outputs.dir }}
	key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
	restore-keys: \|
	${{ runner.os }}-composer-

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}

	- name: Validate composer.json and composer.lock
	run: composer validate

	- name: Install dependencies
	run: composer install

	- name: Run code sniffer
	run: composer cs

	- name: Run phpunit tests
	run: composer unit

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