Add `rumqtt`

README.md

@@ -1336,6 +1336,8 @@ See also [Are we game yet?](https://arewegameyet.rs)
   * [tokio-rs/tokio](https://github.com/tokio-rs/tokio) — A network application framework for rapid development and highly scalable production deployments of clients and servers.
 * message-io
   * [lemunozm/message-io](https://github.com/lemunozm/message-io) — Event-driven message library to build network applications easy and fast. Supports TCP, UDP and WebSockets. [![build badge](https://img.shields.io/github/workflow/status/lemunozm/message-io/message-io%20ci)](https://github.com/lemunozm/message-io/actions?query=workflow%3A%22message-io+ci%22)
+* MQTT
+  * [bytebeamio/rumqtt](https://github.com/bytebeamio/rumqtt) - A library for developers to build applications that communicate with the [MQTT protocol](https://mqtt.org) over TCP and WebSockets, with or without TLS. [![Build and Test](https://github.com/bytebeamio/rumqtt/actions/workflows/build.yml/badge.svg)](https://github.com/bytebeamio/rumqtt/actions/workflows/build.yml)
 * NanoMsg
   * [thehydroimpulse/nanomsg.rs](https://github.com/thehydroimpulse/nanomsg.rs) — [nanomsg](https://nanomsg.org/) bindings [![build badge](https://api.travis-ci.org/thehydroimpulse/nanomsg.rs.svg?branch=master)](https://travis-ci.org/thehydroimpulse/nanomsg.rs)
 * NATS