docs: Add readthedocs configuration file, update dependencies #1279

	name: PHP build
	on:
	[pull_request, push]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	php: [8.0, 8.1, 8.2, 8.3, 8.4, 8.5]
	steps:
	- name: Checkout
	uses: actions/checkout@v2

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

	- name: Install dependencies
	run: composer install --prefer-dist --no-interaction --ansi

	- name: Running phpcs
	run: composer run-script cs

	# The yaml-sort-checker library requires PHP 8.1 or higher,
	# but we want to support older PHP versions,
	# so we install the library here
	# and not using composer.json
	- name: Running yaml-sort-checker
	if: ${{ matrix.php >= '8.1' }}
	run: composer run-script yaml-sort-check

	- name: Run tests
	run: php ./vendor/bin/phpunit

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