delaunayTriangulation
Computes the Delaunay triangulation for the list of 2D points.
The Delaunay triangulation is a triangulation of a set of points such that no point is inside the circumcircle of any triangle. It maximizes the minimum angle of all the angles in the triangles, avoiding skinny triangles.
Return
A DelaunayTriangulation object representing the triangulation of the given points.