Merge pull request #14 from jan-di/issue13

Added username property in ChatType

Author: greenplugin

src/Type/ChatType.php

@@ -54,6 +54,13 @@ class ChatType
      */
     public $lastName;
 
+    /**
+     * Optional. Username of the other party in a private chat.
+     *
+     * @var string|null
+     */
+    public $username;
+
     /**
      * Optional. True if a group has ‘All Members Are Admins’ enabled.
      *