message: fix(background): fix typing
diff: @@ -44,7 +44,7 @@ message.addListener((data, sender: browser.runtime.MessageSender) => {
  return injectCSS(sender)
  case MsgType.QueryQSPanel:
  - return Promise.resolve(qsPanelID !== false) as Promise<MsgQueryQSPanelResponse>
  + return Promise.resolve(qsPanelID !== false)
  case MsgType.OpenQSPanel:
  return openQSPanel()
  