Add experimental StringReaderInterface and Trait #21

	name: PHP 8.1
	on: [push, pull_request]

	jobs:
	ci-tests:

	runs-on: ubuntu-latest
	env:
	PHP_CS_FIXER_IGNORE_ENV: 1

	steps:
	- uses: actions/checkout@v3

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: 8.1

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

	- name: Cache Composer packages
	id: composer-cache
	uses: actions/cache@v3
	with:
	path: vendor
	key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
	restore-keys: \|
	${{ runner.os }}-php-

	- name: Install dependencies
	if: steps.composer-cache.outputs.cache-hit != 'true'
	run: composer install --prefer-dist --no-progress --no-suggest --ignore-platform-reqs

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

	- name: Run PHP Coding Standards Fixer
	run: composer run-script cs-check

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