Svg diagrams backend to jpeg was to make it easier to render & share.
The existing method stressed firefox if too many shapes were there.
The new voronoi diagram method is much faster. Examples now take
approximately 40 seconds to render as opposed to the 5-10 minutes
previously.
In short, it no longer makes the Delunay triangulation. It feeds the 20
closest points to the candidate midpoint. Those points turn out to be
enough, no need to construct the planar graph.
Additionally, dependencies were bumped.
