Inherited properties from external parent classes not showing in subclass docs #769

Hey there, and thanks for the awesome package.

I’m documenting a Python package using mkdocs-material along with the mkdocstrings Python handler.
I have a class that inherits from an external item, for example, pandas.DataFrame, and I will like the parent props to be visible in the child's docs.

I tried a bunch of stuffs (preload_module: [pandas], inherit_members: true), but nothing worked as expected.

Can anyone help me out, please?