Update yoast/phpunit-polyfills requirement from ^2.0 to ^3.0 #149

	name: Unit Testing
	on:
	push:
	pull_request:
	jobs:
	phpunit:
	runs-on: ubuntu-latest
	services:
	mysql:
	image: mariadb:10.4
	env:
	MYSQL_ROOT_PASSWORD: root
	ports:
	- 3306:3306
	options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=10s --health-retries=10
	strategy:
	matrix:
	php-versions: ['7.2', '7.3', '7.4', '8.0']
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}
	coverage: none
	tools: composer, , phpunit-polyfills
	extensions: mysql
	- name: Install Composer dependencies for PHP
	uses: "ramsey/composer-install@v2"
	- name: Setup Test Environment
	run: composer setup-local-tests
	- name: Unit Testing
	run: composer phpunit
	env:
	PHP_VERSION: ${{ matrix.php-versions }}

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