Add Composer autoloading functions and PHPStan for testing

vendor/nikic/php-parser/lib/PhpParser/Node/Arg.php

@@ -0,0 +1,38 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node;
+
+use PhpParser\NodeAbstract;
+
+class Arg extends NodeAbstract
+{
+    /** @var Expr Value to pass */
+    public $value;
+    /** @var bool Whether to pass by ref */
+    public $byRef;
+    /** @var bool Whether to unpack the argument */
+    public $unpack;
+
+    /**
+     * Constructs a function call argument node.
+     *
+     * @param Expr  $value      Value to pass
+     * @param bool  $byRef      Whether to pass by ref
+     * @param bool  $unpack     Whether to unpack the argument
+     * @param array $attributes Additional attributes
+     */
+    public function __construct(Expr $value, bool $byRef = false, bool $unpack = false, array $attributes = []) {
+        parent::__construct($attributes);
+        $this->value = $value;
+        $this->byRef = $byRef;
+        $this->unpack = $unpack;
+    }
+
+    public function getSubNodeNames() : array {
+        return ['value', 'byRef', 'unpack'];
+    }
+    
+    public function getType() : string {
+        return 'Arg';
+    }
+}