message: Wait 3 seconds for Connection::flush
diff: @@ -834,7 +834,7 @@ impl Connection {
  /// # }
  /// ```
  pub fn flush(&self) -> io::Result<()> {
  - self.flush_timeout(Duration::from_secs(60))
  + self.flush_timeout(Duration::from_secs(3))
  }
  /// Flush a NATS connection by sending a `PING` protocol and waiting for the responding `PONG`.
  