message: Use raw bytes instead of utf-8 chars in the nats_bench program
diff: @@ -75,7 +75,7 @@ fn main() -> std::io::Result<()> {
  let subject = args.subject.clone();
  threads.push(thread::spawn(move || {
  let mut rng = thread_rng();
  - let msg: String = (0..message_size).map(|_| rng.gen::<char>()).collect();
  + let msg: Vec<u8> = (0..message_size).map(|_| rng.gen::<u8>()).collect();
  barrier.wait();
  for _ in 0..messages {
  nc.publish(&subject, &msg).unwrap();
  