AnyPath is not a subclass of AnyPath

[chbehrens]

It would be helpful if issubclass(AnyPath, AnyPath) returns True as usually expected if a class is checked against itself. Do you see any possibility to modify it in such a way or is there a good reason why this shouldn't be the case? Unfortunately, I'm not familiar enough with ABCs to directly suggest a solution.

I came across a use case where I want to make sure, that the type of a field is a subclass of a list of classes. Originally, I used pathlib.Path there and checked against (str, numbers.Number, Path) but as cloud paths should become an option, I'd like to replace pathlib.Path with cloudlib.AnyPath.

[pjbull]

Closed by #251