rebuild should use child geometries as the source of dimensional truth

[asinghvi17]

rebuild takes its cue on geometry dimensions from the original geometry, not the child geometries - this means that a 2d to 3d transformation will return e.g. a 2d linestring with internal 3d points.

GeometryOps.jl/src/primitives.jl

Lines 525 to 534 in 2da44be

	rebuild(geom, child_geoms; kw...) = rebuild(GI.trait(geom), geom, child_geoms; kw...)
	function rebuild(trait::GI.AbstractTrait, geom, child_geoms; crs=GI.crs(geom), extent=nothing)
	T = GI.geointerface_geomtype(trait)
	if GI.is3d(geom)
	# The Boolean type parameters here indicate "3d-ness" and "measure" coordinate, respectively.
	return T{true,false}(child_geoms; crs, extent)
	else
	return T{false,false}(child_geoms; crs, extent)
	end
	end