PHP: Add support for PHP 8.3 #80

	name: Code Analysis

	on:
	pull_request:
	push:

	jobs:
	code_analysis:
	strategy:
	fail-fast: false
	matrix:
	php:
	- '7.2'
	- '7.3'
	- '7.4'
	- '8.0'
	- '8.1'
	- '8.2'
	- '8.3'

	actions:
	- name: PHPStan
	run: composer phpstan

	- name: Unit tests
	run: vendor/bin/tester tests -s -C

	versions:
	- name: newest
	arg: ''
	experimental: false

	- name: lowest
	arg: '--prefer-lowest'
	experimental: true

	name: ${{ matrix.actions.name }} at PHP ${{ matrix.php }} (${{ matrix.versions.name }})
	runs-on: ubuntu-latest

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


	# see https://github.com/shivammathur/setup-php
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}
	extensions: json
	coverage: none


	# see https://github.com/actions/cache/blob/main/examples.md#php---composer
	- name: Get Composer Cache Directory
	id: composer-cache
	run: \|
	echo "::set-output name=dir::$(composer config cache-files-dir)"
	- uses: actions/cache@v2
	with:
	path: \|
	${{ steps.composer-cache.outputs.dir }}
	**/composer.lock
	key: ${{ runner.os }}-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}


	- name: Install Composer
	run: composer update --no-progress ${{ matrix.versions.arg }}

	- run: ${{ matrix.actions.run }}
	continue-on-error: ${{ matrix.versions.experimental }}

Provide feedback