fix: error code may be null #373

	name: Formats

	on: ['push', 'pull_request']

	jobs:
	ci:
	runs-on: ${{ matrix.os }}

	strategy:
	fail-fast: true
	matrix:
	os: [ubuntu-latest]
	php: [8.1]
	dependency-version: [prefer-lowest, prefer-stable]

	name: Formats P${{ matrix.php }} - ${{ matrix.os }} - ${{ matrix.dependency-version }}

	steps:

	- name: Checkout
	uses: actions/checkout@v2

	- name: Cache dependencies
	uses: actions/cache@v1
	with:
	path: ~/.composer/cache/files
	key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}
	extensions: dom, mbstring, zip
	tools: prestissimo
	coverage: pcov

	- name: Install Composer dependencies
	run: composer update --${{ matrix.dependency-version }} --no-interaction --prefer-dist

	- name: Coding Style Checks
	run: composer test:lint

	- name: Refacto Checks
	run: composer test:refacto

	- name: Type Checks
	run: composer test:types

	- name: Type Coverage
	run: composer test:type-coverage min=100

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