PB-416: Phpgt/Dom does not support PHP 7.1.0

- add whitelist support for redundant dependencies

Author: omiroshnichenko

dev/tests/static/testsuite/Magento/Test/Integrity/_files/dependency_test/whitelist/redundant_dependencies_pagebuilder.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+return [
+    'Magento\PageBuilder' => [
+        'magento/dom'
+    ]
+];