* 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/nikic/php-parser/lib/PhpParser/Node/FunctionLike.php

@@ -0,0 +1,43 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node;
+
+use PhpParser\Node;
+
+interface FunctionLike extends Node
+{
+    /**
+     * Whether to return by reference
+     *
+     * @return bool
+     */
+    public function returnsByRef() : bool;
+
+    /**
+     * List of parameters
+     *
+     * @return Param[]
+     */
+    public function getParams() : array;
+
+    /**
+     * Get the declared return type or null
+     *
+     * @return null|Identifier|Name|ComplexType
+     */
+    public function getReturnType();
+
+    /**
+     * The function body
+     *
+     * @return Stmt[]|null
+     */
+    public function getStmts();
+
+    /**
+     * Get PHP attribute groups.
+     *
+     * @return AttributeGroup[]
+     */
+    public function getAttrGroups() : array;
+}