Make constants const #658

	name: Lint and analyse php files

	on:
	push:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	lint-php:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Use PHP 8.1
	uses: shivammathur/setup-php@v2
	with:
	php-version: 8.1
	- name: Validate composer.json and composer.lock
	run: composer validate
	- name: Cache module
	uses: actions/cache@v3
	with:
	path: ~/.composer/cache/
	key: composer-cache
	- name: Install dependencies
	run: composer install
	- name: Lint files
	run: composer run phpcs

	analyse-php:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	php-version: ["8.1"]
	steps:
	- uses: actions/checkout@v3
	- name: Use PHP ${{ matrix.php-version }}
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-version }}
	tools: composer:v2

	- name: Get Composer cache directory
	id: composer-cache
	run: \|
	echo "::set-output name=dir::$(composer config cache-files-dir)"

	- name: Cache dependencies
	uses: actions/cache@v3
	with:
	path: ${{ steps.composer-cache.outputs.dir }}
	key: composer-${{ runner.os }}-${{ matrix.php-version }}-${{ hashFiles('*/composer.') }}
	restore-keys: \|
	composer-${{ runner.os }}-${{ matrix.php-version }}-

	- name: Install dependencies
	run: composer install
	- name: Analyse files with PHPStan
	run: composer run phpstan
	- name: Analyse files with Psalm
	# Allow the previous check to fail but not abort
	if: always()
	run: composer run psalm -- --shepherd

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