message: fix: otr initialization
  fix
diff: @@ -48,9 +48,9 @@ export default class CarbonsPlugin extends AbstractPlugin {
  let body = (<any> xmlElement).node.textContent;
  if (body.match(/^\?OTR/)) {
  - xmlElement.up().c('private', {
  + xmlElement.c('private', {
  xmlns: CONST.NS.CARBONS
  - });
  + }).up();
  }
  return Promise.resolve([message, xmlElement]);
  