add: asgi library to third party list

[thearchitector]

What do these changes do?

Adding aiohttp-asgi-connector to the list of third party libraries. It implements a custom connector to allow interacting directly with ASGI applications instead of going through a web server.

Are there changes in behavior for the user?

N/A

Is it a substantial burden for the maintainers to support this?

N/A

Related issue number

N/A

Checklist

N/A