rumqttd 0.16.0

Blog Post discussing this release - https://bytebeam.io/blog/qos2-and-websockets-support-rumqttd/

Significant Changes

• QoS2 support (#604) 🚀
• Support for Websocket connections (#633) 🕸️

Changed

• Ability to configure segment size individually (#602)
• LinkBuilder for constructing LinkRx/LinkTx (#659)

Deprecated

• Link and its implementation, use LinkBuilder instead

Fixed

• Include reason code for UnsubAck in v5

New Contributors 🎉

• @Nickztar made their first contribution in #633
• @anirudhRowjee made their first contribution in #635