testing with geopandas.dataset module – deprecation

[jGaboardi]

Some of our tests here use the geopandas.dataset module, which is now deprecated. We should decide if the tests should be updated for a different source (and the notebooks will need to be updated, too) or something else.

/Users/user/mapclassify/mapclassify/tests/test_greedy.py:11: FutureWarning: The geopandas.dataset module is deprecated and will be removed in GeoPandas 1.0. You can get the original 'naturalearth_lowres' data from https://www.naturalearthdata.com/downloads/110m-cultural-vectors/.
    world = geopandas.read_file(geopandas.datasets.get_path("naturalearth_lowres"))

<doctest mapclassify.greedy.greedy[2]>:1: FutureWarning: The geopandas.dataset module is deprecated and will be removed in GeoPandas 1.0. You can get the original 'naturalearth_lowres' data from https://www.naturalearthdata.com/downloads/110m-cultural-vectors/.