pydanny
Use iscoroutinefunction from inspect not asyncio
Python 3.14 will deprecate asyncio.iscoroutinefunction: https://github.com/python/cpython/pull/122875
inspect.iscoroutinefunction exists since 3.5 and our baseline is 3.8, so we can just use it unconditionally.
Using a wrapper with @asyncio.coroutine in get wasn't necessary (the future from asyncio.ensure_future is awaitable, and the wrapper doesn't do anything asynchronous), so the logic can be simplified to just call asyncio.ensure_future (to schedule the task and store the result when it's available).
This is a rebase of https://github.com/pydanny/cached-property/pull/267 , but it turns out to be much simpler against 2.0.1. Skipping test_coroutine_cached_property.py as the original did no longer appears to be necessary - arguably that test could now be removed as we're targeting a 3.8 baseline, but it seems like that could be a separate PR. @encukou for info, I've kept you as the author of this but can change it to me if you don't want your name on it any more :)
