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

plugins/php-imap/vendor/illuminate/contracts/Cache/LockProvider.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Illuminate\Contracts\Cache;
+
+interface LockProvider
+{
+    /**
+     * Get a lock instance.
+     *
+     * @param  string  $name
+     * @param  int  $seconds
+     * @param  string|null  $owner
+     * @return \Illuminate\Contracts\Cache\Lock
+     */
+    public function lock($name, $seconds = 0, $owner = null);
+
+    /**
+     * Restore a lock instance using the owner identifier.
+     *
+     * @param  string  $name
+     * @param  string  $owner
+     * @return \Illuminate\Contracts\Cache\Lock
+     */
+    public function restoreLock($name, $owner);
+}