Replace deprecated asyncio.iscoroutinefunction

[cdce8p]

Python 3.14 will deprecated asyncio.iscoroutinefunction in favor of inspect.iscoroutinefunction which has been available for some time now.

https://docs.python.org/3.14/deprecations/pending-removal-in-3.16.html https://docs.python.org/3.14/library/inspect.html#inspect.iscoroutinefunction