change gitignore

vendor/league/config/src/ConfigurationProviderInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the league/config package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace League\Config;
+
+/**
+ * Interface for a service which provides a readable configuration object
+ */
+interface ConfigurationProviderInterface
+{
+    public function getConfiguration(): ConfigurationInterface;
+}