message: Fix ureq compile error
diff: @@ -85,7 +85,7 @@ impl BaseHttpClient for UreqClient {
  let sender = |req: Request| {
  let payload = payload
  .iter()
  - .map(|(key, val)| (key.as_str(), val.as_str()))
  + .map(|(key, val)| (*key, *val))
  .collect::<Vec<_>>();
  req.send_form(&payload)
  