Fix for fiona 1.10

[perrygeo]

Fiona behavior changed slightly when opening GeoJSON strings. See Toblerity/Fiona#1455

We can work around this in a backwards compatible way by catching the ValueError so that GeoJSON strings take the json.loads code path.

[perrygeo]

Python 3.8 is failing and I have no clue why.

    def _is_zip(path):
        """Check if a given path is a zipfile"""
>       parsed = fiona.path.ParsedPath.from_uri(path)
E       AttributeError: module 'fiona' has no attribute 'path'

It's only the geopandas tests failing. FWIW Geopandas is now on minimum Python 3.10 and Python 3.8 is EOL as of this month. So my plan is to bump this project to min version 3.9 and remove it.