Remove the vendor directory in .gitignore as these dependencies are needed for php-imap

plugins/php-imap/vendor/illuminate/contracts/Bus/QueueingDispatcher.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Illuminate\Contracts\Bus;
+
+interface QueueingDispatcher extends Dispatcher
+{
+    /**
+     * Attempt to find the batch with the given ID.
+     *
+     * @param  string  $batchId
+     * @return \Illuminate\Bus\Batch|null
+     */
+    public function findBatch(string $batchId);
+
+    /**
+     * Create a new batch of queueable jobs.
+     *
+     * @param  \Illuminate\Support\Collection|array  $jobs
+     * @return \Illuminate\Bus\PendingBatch
+     */
+    public function batch($jobs);
+
+    /**
+     * Dispatch a command to its appropriate handler behind a queue.
+     *
+     * @param  mixed  $command
+     * @return mixed
+     */
+    public function dispatchToQueue($command);
+}