Revert the last commit in #5. As suggested by this comment, I have also added a reference to BSD3 clause licence.
* Copyright (c) 2000-2006 Wolfgang Hoermann and Josef Leydold *
* Department of Statistics and Mathematics, WU Wien, Austria *
* SPDX-License-Identifier: BSD-3-Clause *
Revert the last commit in #5. As suggested by this comment, I have also added a reference to BSD3 clause licence.