difference depends on order of polygons

[asinghvi17]

I was trying to make a more minimal example for #191 and ran into the following strange bug.

julia> import GeometryOps as GO, GeoInterface as GI
julia> p56 = GI.Polygon([[(0.0, 0.0), (0.0, 10.0), (10.0, 10.0), (10.0, 0.0), (0.0, 0.0)]]);
julia> p57 = GI.Polygon([[(0.0, 0.0), (0.0, 11.0), (11.0, 11.0), (11.0, 0.0), (0.0, 0.0)]]);
julia> p1 = GO.difference(p57, p56; target = GI.PolygonTrait()) # this is good
1-element Vector{GeoInterface.Wrappers.Polygon{false, false, Vector{GeoInterface.Wrappers.LinearRing{false, false, Vector{Tuple{Float64, Float64}}, Nothing, Nothing}}, Nothing, Nothing}}:
 GeoInterface.Wrappers.Polygon{false, false, Vector{GeoInterface.Wrappers.LinearRing{false, false, Vector{Tuple{Float64, Float64}}, Nothing, Nothing}}, Nothing, Nothing}(GeoInterface.Wrappers.LinearRing{false, false, Vector{Tuple{Float64, Float64}}, Nothing, Nothing}[GeoInterface.Wrappers.LinearRing{false, false, Vector{Tuple{Float64, Float64}}, Nothing, Nothing}([(0.0, 10.0), (0.0, 11.0), (11.0, 11.0), (11.0, 0.0), (10.0, 0.0), (10.0, 10.0), (0.0, 10.0)], nothing, nothing)], nothing, nothing)

julia> p1 = GO.difference(p56, p57; target = GI.PolygonTrait()) # this is bad
GeoInterface.Wrappers.Polygon{false, false, Vector{GeoInterface.Wrappers.LinearRing{false, false, Vector{Tuple{Float64, Float64}}, Nothing, Nothing}}, Nothing, Nothing}[]
julia> begin; f, a, p = poly(p56); poly!(a, p57); f; end