Potencial Deadlock fix

[Netzvamp]

Hey,

i've got a deadlock when i've tried to use "send" inside a handler, for example:

from genesis import Session

class MyCall:
    def __init__(self, session: Session):
        self.session = session
        self.session.on('CHANNEL_BRIDGE', self.on_bridge)
        ...

    async def on_bridge(self, event):
        filter_output = await self.session.send(f"filter Unique-ID {event['Other-Leg-Unique-ID']}")
        print(filter_output)
        ...

The print(filter_output) will never run, cause the consumer is still stuck in the on_bridge handler and doesn't process the answer from the send command.

So i pushed the handlers in it's own tasks with:

if iscoroutinefunction(handler):
      create_task(handler(event))
  else:
      create_task(to_thread(handler, event))

That works for me, but i'm not sure that there aren't any side effects i don't know about. ⚠️ ⚠️ ⚠️

And i've fixed some typos and type hints.

I've read into the "-> Awaitable[Something]" return values and you can skip that and just write "-> Something", cause the async already implies the "Awaitable".

[Otoru]

Hi,

Thanks for another contribution to the project, I'm glad to see more people using it.

Everything looks good to me and no tests broke. I'll approve the merge request.