GO.tuples should return canonical geometry types

[asinghvi17]

For example, GO.tuples polygons should be composed of LinearRings not LineStrings. Maybe this is something we can do in rebuild instead, though.

I get a bunch of issues when using geometries (even after GO.tuples) from different packages in GO polygon clipping.

[rafaqz]

This is just apply on PolygonTrait, which I already fixed for the tests PR