failing CI -- `test_voronoi.py::TestVoronoi::test_union_fallback`

[jGaboardi]

• failing voronoi CI
• @martinfleis - I want to confirm this is still expected as per #776 / #777
• If so, let's simply close out.

FAILED libpysal/cg/tests/test_voronoi.py::TestVoronoi::test_union_fallback - AttributeError: 'GeoSeries' object has no attribute 'make_valid'

[martinfleis]

That env has geopandas 0.10.0 from 2021. Yeah, that one did not have make_valid but that is also not the one we should be pinning the env to.

[martinfleis]

As per SPEC0, we should be pinning 0.13 now and 0.14 next month. make_valid is present in 0.12 already.

[jGaboardi]

resolved in #794