Misuse RuntimeWarning exception?

[atugushev]

While RuntimeWarning is technically an exception, it should not be raised in code, because conceptually it belongs to the warnings mechanism.

ansq/ansq/tcp/types/message.py

Lines 22 to 26 in d848c8c

	async def decorator(cls: "NSQMessage", *args: Any, **kwargs: Any) -> Any:
	if cls.is_processed:
	raise RuntimeWarning("Message has already been processed")
	response = await func(cls, *args, **kwargs)
	return response

Originally posted by @atugushev in #28 (comment)