Shapely deprecation warning

[couteau]

Graph raises the following deprecation warning when assigning ids to geometries for purposes of calculating adjacency:

... /gerrychain/graph/adjacency.py:21: ShapelyDeprecationWarning: Setting custom attributes on geometry objects is deprecated, and will raise an AttributeError in Shapely 2.0
  geometries[i].id = I

Another method of tracking geometry identity should be developed before any migration to Shapely 2.0 is undertaken. Perhaps a dict?

[InnovativeInventor]

Graph raises the following deprecation warning when assigning ids to geometries for purposes of calculating adjacency:

... /gerrychain/graph/adjacency.py:21: ShapelyDeprecationWarning: Setting custom attributes on geometry objects is deprecated, and will raise an AttributeError in Shapely 2.0
  geometries[i].id = I

Another method of tracking geometry identity should be developed before any migration to Shapely 2.0 is undertaken. Perhaps a dict?

Yep, this is an issue. Contributions are welcome!