Add vendor and .env to make usable

vendor/symfony/var-dumper/Exception/ThrowingCasterException.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\VarDumper\Exception;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ThrowingCasterException extends \Exception
+{
+    /**
+     * @param \Exception $prev The exception thrown from the caster
+     */
+    public function __construct(\Exception $prev)
+    {
+        parent::__construct('Unexpected '.get_class($prev).' thrown from a caster: '.$prev->getMessage(), 0, $prev);
+    }
+}