Bump actions/cache from 2 to 4 #33

	name: "PHPStan"

	on:
	- push
	- pull_request

	env:
	COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
	SYMFONY_PHPUNIT_VERSION: ""

	jobs:
	tests:
	name: "PHPStan"

	runs-on: ubuntu-latest

	strategy:
	matrix:
	php-version:
	# pinned to 7.4 because we need PHPUnit 7.5 which does not support PHP 8
	- "7.4"

	steps:
	- name: "Checkout"
	uses: "actions/checkout@v2"

	- name: "Install PHP"
	uses: "shivammathur/setup-php@v2"
	with:
	coverage: "none"
	php-version: "${{ matrix.php-version }}"

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

	- name: Cache dependencies
	uses: actions/cache@v4
	with:
	path: ${{ steps.composercache.outputs.dir }}
	key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
	restore-keys: ${{ runner.os }}-composer-

	- name: "Install latest dependencies"
	run: "composer update ${{ env.COMPOSER_FLAGS }}"

	- name: Run PHPStan
	# Locked to phpunit 7.5 here as newer ones have void return types which break inheritance
	run: \|
	composer require --dev phpunit/phpunit:^7.5.20 --with-all-dependencies ${{ env.COMPOSER_FLAGS }}
	vendor/bin/phpstan analyse

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