phpunit.xml migrated to the new PHPUnit 9 schema

plugins/woocommerce/phpunit.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	bootstrap="tests/legacy/bootstrap.php"
 	backupGlobals="false"
 	colors="true"
@@ -7,18 +7,19 @@
 	convertNoticesToExceptions="true"
 	convertWarningsToExceptions="true"
 	verbose="true"
-	>
+	xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
 	<testsuites>
 		<testsuite name="WooCommerce Test Suite">
 			<directory suffix=".php">./tests/legacy/unit-tests</directory>
 			<directory suffix=".php">./tests/php</directory>
 		</testsuite>
 	</testsuites>
-	<filter>
-		<whitelist addUncoveredFilesFromWhitelist="true">
+	<coverage includeUncoveredFiles="true">
+		<include>
 			<directory suffix=".php">./includes</directory>
 		<file>woocommerce.php</file>
 		<file>uninstall.php</file>
+		</include>
 		<exclude>
 			<directory suffix=".php">./includes/admin/helper/views</directory>
 			<directory suffix=".php">./includes/admin/importers/views</directory>
@@ -44,6 +45,5 @@
 			<file>./includes/wc-template-hooks.php</file>
 			<file>./includes/wc-widget-functions.php</file>
 		</exclude>
-		</whitelist>
-	</filter>
+	</coverage>
 </phpunit>