Delaunator v4 got an update method to update triangulation after editing coordinates in place, avoiding a lot of new memory allocations for use cases like the Lloyd's algorithm (see mapbox/delaunator#36).

It would be great to make a corresponding change in d3-delaunay as well. The Delaunay class would have to hold on to the whole delaunator object then (instead of just triangles, halfedges and hull), and update inedges/outedges after calling delaunator.update in a potential update method.