chore: add compatibility for Protobuf v4 #10

	name: Test Suite
	on:
	push:
	branches:
	- master
	pull_request:
	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	php: [ 7.4, "8.0", 8.1, 8.2 ]
	name: "PHP ${{ matrix.php }} Unit Test"
	steps:
	- uses: actions/checkout@v2
	- uses: codecov/codecov-action@v1
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}
	tools: pecl
	extensions: grpc-1.49.0
	- name: Install composer dependencies
	uses: nick-invision/retry@v1
	with:
	timeout_minutes: 10
	max_attempts: 3
	command: composer install
	- name: Run PHPUnit
	run: vendor/bin/phpunit -v

Provide feedback