* Fix precision error calculating _voronoi_.neighbors. https://github.com/d3/d3-delaunay/pull/138 https://github.com/d3/d3-delaunay/pull/139 * Fix broken polygon. https://github.com/d3/d3-delaunay/pull/140 * Fix threshold generation when input is empty or has no deviation. https://github.com/d3/d3-array/pull/271