Make the inputs for the polyskel methods consistent with ladybug-geometry #20
Description
Currently all inputs for ladybug-geometry are ladybug-geometry objects (i.e Point2Ds, Polygon2Ds). In contrast the polyskeleton methods are arrays of points, in different orders to differentiate between outer boundary polygons and interior holes.
Changing all the input arguments in polyskeleton into ladybug geometry equivalents will make working between these libraries more seamless.