Use stdlib asyncio to handle UDP communication

Avoids multi-threading by using an event loop.

https://docs.python.org/3/library/asyncio.html

Has examples of UDP echo client/server and also communicates connections lost.

https://docs.python.org/3/library/asyncio-protocol.html#udp-echo-client-protocol

Concern is that it is maintaining a transport. Can the transport be bundled with the message received? Some instances show the server killing the connection after it responds to the request. Seems like overkill and not something we want to do.