change gitignore

vendor/league/commonmark/src/ConverterInterface.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the league/commonmark 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\CommonMark;
+
+use League\CommonMark\Output\RenderedContentInterface;
+
+/**
+ * Interface for a service which converts content from one format (like Markdown) to another (like HTML).
+ */
+interface ConverterInterface
+{
+    /**
+     * @throws \RuntimeException
+     */
+    public function convert(string $input): RenderedContentInterface;
+}