* add phpunit as a dev dependency

* add some basic tests for UrlHelper::rewrite_relative()
 * fix UrlHelper::rewrite_relative() to work better on non-absolute
   relative URL paths

vendor/phpdocumentor/reflection-docblock/src/DocBlockFactoryInterface.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace phpDocumentor\Reflection;
+
+use phpDocumentor\Reflection\DocBlock\Tag;
+
+// phpcs:ignore SlevomatCodingStandard.Classes.SuperfluousInterfaceNaming.SuperfluousSuffix
+interface DocBlockFactoryInterface
+{
+    /**
+     * Factory method for easy instantiation.
+     *
+     * @param array<string, class-string<Tag>> $additionalTags
+     */
+    public static function createInstance(array $additionalTags = []): DocBlockFactory;
+
+    /**
+     * @param string|object $docblock
+     */
+    public function create($docblock, ?Types\Context $context = null, ?Location $location = null): DocBlock;
+}