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

plugins/php-imap/vendor/illuminate/contracts/Validation/ImplicitRule.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Illuminate\Contracts\Validation;
+
+/**
+ * @deprecated see ValidationRule
+ */
+interface ImplicitRule extends Rule
+{
+    //
+}