Use version 8.1 in CI #27

	name: PHP Composer

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

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

	- name: Cache Composer packages
	id: composer-cache
	uses: actions/cache@v2
	with:
	path: vendor
	key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
	restore-keys: \|
	${{ runner.os }}-php-

	- name: Install dependencies
	run: ./composer.phar 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: ./vendor/bin/phpunit test/

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