GeoDataset: allow a mix of str and pathlib paths

[adamjstewart]

Currently, if a user passes in both str and pathlib.Path paths, GeoDataset crashes:

        # Sort the output to enforce deterministic behavior.
>       return sorted(files)
E       TypeError: '<' not supported between instances of 'PosixPath' and 'str'

The easiest solution is to convert all values to the same type for easy comparison. This also prevents duplicates, since:

>>> import os
>>> import pathlib
>>> x = "foo/bar"
>>> y = pathlib.Path("foo/bar")
>>> x == y
False

FYI @pioneerHitesh @adriantre

[adriantre]

Looks good to me 👍