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

plugins/php-imap/vendor/illuminate/contracts/Pipeline/Pipeline.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Illuminate\Contracts\Pipeline;
+
+use Closure;
+
+interface Pipeline
+{
+    /**
+     * Set the traveler object being sent on the pipeline.
+     *
+     * @param  mixed  $traveler
+     * @return $this
+     */
+    public function send($traveler);
+
+    /**
+     * Set the stops of the pipeline.
+     *
+     * @param  dynamic|array  $stops
+     * @return $this
+     */
+    public function through($stops);
+
+    /**
+     * Set the method to call on the stops.
+     *
+     * @param  string  $method
+     * @return $this
+     */
+    public function via($method);
+
+    /**
+     * Run the pipeline with a final destination callback.
+     *
+     * @param  \Closure  $destination
+     * @return mixed
+     */
+    public function then(Closure $destination);
+}