Support for MQTT version 5.x ?

Is there any plans to create a lib for mqttv5 client?
I must use a client with v5 support sinse consumers expect "content type" set as well as "user properties"(key/valuse) in header data

also I urgently need support for a client that let the broker assign a clientId, meaning client do not provide a clientId at connection, it will get one assigned by the broker in the conACK..
This is a way to avoid client "ping-pong" where two clients using the same clientId, and kick eatch other out while reconnecting.

Best regads,
Anders

The issue names no files, tests, or entry points. Start by reviewing the existing MQTT client and its protocol support, then determine the scope for MQTT 5 content type, user properties, and broker-assigned client IDs. Done means the client supports the requested MQTT 5 behavior and avoids client-ID collisions during reconnects.

Written by the indexing model from the issue text.