Use native union types #46

	name: PHP tests

	on:
	push:
	branches:
	- main
	- release/**
	- feature/php8
	pull_request:
	branches:
	- main

	jobs:
	build:

	strategy:
	matrix:
	php-versions: ['8.1', '8.2', '8.3']

	runs-on: ubuntu-latest

	steps:
	# https://github.com/marketplace/actions/checkout
	- name: Checkout
	uses: actions/checkout@v4

	# https://github.com/marketplace/actions/setup-php-action
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}
	extensions: mbstring, intl
	ini-values: post_max_size=256M, max_execution_time=180

	- name: Check PHP version
	run: php -v

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

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

	- name: Code lint PHP files
	run: ./vendor/bin/phplint

	- name: Coding standards
	run: ./vendor/bin/phpcs

	- name: PHPUnit
	run: ./vendor/bin/phpunit

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