Add support for symfony/process 6 #11

	name: PHPStan tests

	on:
	pull_request:
	push:

	jobs:
	phpunit:
	name: PHPStan tests

	runs-on: ${{ matrix.operating-system }}

	strategy:
	matrix:
	operating-system:
	- ubuntu-latest
	php-version:
	- 7.4
	- 8.0
	- 8.1

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Cache dependencies
	uses: actions/cache@v3
	with:
	path: /tmp/composer-cache
	key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}

	- name: Install dependencies
	uses: php-actions/composer@v6
	with:
	args: --prefer-dist --ansi --no-interaction --no-progress --no-suggest

	- name: PHPStan
	uses: php-actions/phpstan@v3
	with:
	php_version: ${{ matrix.php-version }}
	path: src tests
	level: 5

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