added INVITES-dbVersion to invite plugin default config file

api/plugins/invites/config.php

@@ -1,10 +1,11 @@
 <?php
 return array(
 	'INVITES-enabled' => false,
+	'INVITES-dbVersion' => '1.0.0',
 	'INVITES-type-include' => 'plex',
 	'INVITES-plexLibraries' => '',
 	'INVITES-EmbyTemplate' => '',
 	'INVITES-plex-tv-labels' => '',
 	'INVITES-plex-music-labels' => '',
 	'INVITES-plex-movies-labels' => ''
-);
+);