Use random ports when port number is 0 (#79)

* Use random ports when port number is 0

* Add support for --max-port CLI option

* Fix typo

* Fix another typo

* Update README

src/client.rs

@@ -3,9 +3,7 @@
 use std::sync::Arc;
 
 use anyhow::{bail, Context, Result};
-
-use tokio::io::AsyncWriteExt;
-use tokio::{net::TcpStream, time::timeout};
+use tokio::{io::AsyncWriteExt, net::TcpStream, time::timeout};
 use tracing::{error, info, info_span, warn, Instrument};
 use uuid::Uuid;