World covid19 stats (#2271)

* Josephus problem in Python

Added the code for the josephus problem in python using circular linked lists.

* Update josephus_problem.py

* Added World covid19 stats in web programming

* Delete josephus_problem.py

* Type hints, algorithmic functions should not print

Return a dict of world covid19 stats.  Move all printing into the main functions.

* Update world_covid19_stats.py

* Update world_covid19_stats.py

Co-authored-by: Christian Clauss <[email protected]>