Update python-telegram-bot to 20.6

[OniMock]

Describe the proposed feature

Is it possible to update the python-telegram-bot dependency to version 20.6?

I tried to update, but I couldn't implement it in the code.

[Steffo99]

I think the library has changed a lot since then, it's not a trivial task...

[OniMock]

Yes, it's very difficult.
most methods can be transformed into async, but in the work class method __receive_next_update

I can't return the data variable that is inside the try
Always ends up falling into the except queuem.Empty

I've already tried transforming it into asyncio.Queue, but I didn't get any results.

[codewarnab]

i can do this i have updated many ptb repos ro v20 from v13

[techistoner]

Whether there is the possibility of upgrading