Prevent event loop blocking by sync handler

[ediskandarov]

    async def handle(self, event: Event) -> None:
        for handler in self._get_handlers_for_event(event_name=event[0]):
            if inspect.iscoroutinefunction(handler):
                await handler(event)
            else:
                handler(event)

[melvinkcx]

Thanks for reporting this. I'm fixing it and deploying a new version soon