upgrade to laravel 7 and set branch to v2

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/ArrayDimFetch.php

@@ -1,34 +0,0 @@
-<?php declare(strict_types=1);
-
-namespace PhpParser\Node\Expr;
-
-use PhpParser\Node\Expr;
-
-class ArrayDimFetch extends Expr
-{
-    /** @var Expr Variable */
-    public $var;
-    /** @var null|Expr Array index / dim */
-    public $dim;
-
-    /**
-     * Constructs an array index fetch node.
-     *
-     * @param Expr      $var        Variable
-     * @param null|Expr $dim        Array index / dim
-     * @param array     $attributes Additional attributes
-     */
-    public function __construct(Expr $var, Expr $dim = null, array $attributes = []) {
-        $this->attributes = $attributes;
-        $this->var = $var;
-        $this->dim = $dim;
-    }
-
-    public function getSubNodeNames() : array {
-        return ['var', 'dim'];
-    }
-    
-    public function getType() : string {
-        return 'Expr_ArrayDimFetch';
-    }
-}