Upgrade phpunit.xml.dist format

phpunit.xml.dist

@@ -1,30 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
-<phpunit
-         backupGlobals="false"
-         colors="true"
-         bootstrap="tests/bootstrap.php"
->
-    <php>
-        <ini name="error_reporting" value="-1" />
-        <server name="KERNEL_DIR" value="tests/Fixtures" />
-        <server name="KERNEL_CLASS" value="AppKernel" />
-        <server name="SYMFONY_DEPRECATIONS_HELPER" value="max[self]=7" />
-    </php>
-
-    <testsuites>
-        <testsuite name="Project Test Suite">
-            <directory>tests</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist>
-            <directory>.</directory>
-            <exclude>
-                <directory>tests</directory>
-                <directory>vendor</directory>
-            </exclude>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" colors="true" bootstrap="tests/bootstrap.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory>.</directory>
+    </include>
+    <exclude>
+      <directory>tests</directory>
+      <directory>vendor</directory>
+    </exclude>
+  </coverage>
+  <php>
+    <ini name="error_reporting" value="-1"/>
+    <server name="KERNEL_DIR" value="tests/Fixtures"/>
+    <server name="KERNEL_CLASS" value="AppKernel"/>
+    <server name="SYMFONY_DEPRECATIONS_HELPER" value="max[self]=7"/>
+  </php>
+  <testsuites>
+    <testsuite name="Project Test Suite">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>