Add new optional beta email parser thats based on ImapEngine instead of Webklex

plugins/vendor/egulias/email-validator/src/Warning/IPV6ColonStart.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Egulias\EmailValidator\Warning;
+
+class IPV6ColonStart extends Warning
+{
+    public const CODE = 76;
+
+    public function __construct()
+    {
+        $this->message = ':: found at the start of the domain literal';
+        $this->rfcNumber = 5322;
+    }
+}