`unawaited_futures` false negative for `FutureOr`

[FMorschel]

Describe the issue
unawaited_futures not linting with FutureOr

To Reproduce
Add the lint to analysis_options.yaml and run the following:

void main() async {
  futureOrFunc(); //Nothing
  futureFunc(); //Linted
}

Future<void> futureFunc() async {}

FutureOr<void> futureOrFunc() async {}

Expected behavior
I expected the linter to warn me about FutureOr Functions so that I only process things after the previous lines have been processed.

[lrhn]

The current description of unawaited_futures only say that it warns about things with type Future, not FutureOr.

So it's doing what it claims it's doing.
It's not unreasonable to want to always await a FutureOr too, but be aware that unawaited only accepts a Future as argument, so you can't do unawaited(futureOrFunc()); to disable a lint applying to FutureOrs.