Update for php 8.3 #41

	name: PHPUnit 5.4,5.6
	on: [push, pull_request]
	jobs:
	build:

	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	matrix:
	php-versions: [5.4, 5.6]
	name: PHP ${{ matrix.php-versions }}

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

	- name: Install PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}
	extensions: intl #optional
	ini-values: "post_max_size=256M" #optional

	- name: Check PHP Version
	run: php -v

	- name: Remove phpstan from composer
	run: sed -i "/\bphpstan\b/d" composer.json

	- name: Update composer.lock
	run: composer update

	- name: Validate composer.json and composer.lock
	run: composer validate --strict

	- name: Install dependencies
	run: composer install --prefer-dist --no-progress

	# Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
	# Docs: https://getcomposer.org/doc/articles/scripts.md

	- name: Run test suite
	run: composer run-script phpunit

Provide feedback