message: fix: xml builder in chat state plugin
diff: @@ -69,7 +69,7 @@ export default class ChatStatePlugin extends AbstractPlugin {
  if (message.getType() === Message.MSGTYPE.CHAT) {
  xmlStanza.c('active', {
  xmlns: Namespace.get('CHATSTATES')
  - });
  + }).up();
  }
  return Promise.resolve([message, xmlStanza]);
  