Update dependencies + add support for psr/http-message 2.x #9

	name: "testing"

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

	jobs:
	qa:
	name: Quality assurance
	runs-on: ubuntu-latest

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

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

	- 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
	if: steps.composer-cache.outputs.cache-hit != 'true'
	run: composer install --prefer-dist --no-progress --no-suggest

	- name: Coding Standard
	run: composer run-script cs

	tests:
	name: Tests
	runs-on: ubuntu-latest

	strategy:
	matrix:
	php:
	- 7.2
	- 7.3
	- 7.4
	composer-args: [ "" ]
	include:
	- php: 8.0
	composer-args: --ignore-platform-reqs
	fail-fast: false

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

	- name: Install PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}

	- name: Cache PHP dependencies
	uses: actions/cache@v2
	with:
	path: vendor
	key: ${{ runner.os }}-php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}
	restore-keys: ${{ runner.os }}-php-${{ matrix.php }}-composer-

	- name: Install dependencies
	run: composer install --prefer-dist --no-progress --no-suggest ${{ matrix.composer-args }}

	- name: Tests
	run: composer test

	- name: Tests coverage
	run: composer coverage

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