change gitignore

vendor/nunomaduro/collision/src/Exceptions/ShouldNotHappen.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace NunoMaduro\Collision\Exceptions;
+
+use RuntimeException;
+
+/**
+ * @internal
+ */
+final class ShouldNotHappen extends RuntimeException
+{
+    /**
+     * @var string
+     */
+    private const MESSAGE = 'This should not happen, please open an issue on collision repository: %s';
+
+    /**
+     * Creates a new Exception instance.
+     */
+    public function __construct()
+    {
+        parent::__construct(sprintf(self::MESSAGE, 'https://github.com/nunomaduro/collision/issues/new'));
+    }
+}