Clang 10-git warns with this change: class with destructor
marked 'final' cannot be inherited from
[-Wfinal-dtor-non-final-class]

* call impl method with specialized types

changes only affect documentation

Rename grahamConvexHull2d3d to grahamConvexHull<2>,
deprecate old interface.

Dennis Gläser authored May 30, 2019 and Timo Koch committed Jun 17, 2019

This actually makes use of the 2d in 3d algorithm at the moment. In the
future a more efficient implementation for 2d hulls could be
implemented.