The ujson module apparently will accept both bytes and text format
input, however, it does always output a str (both on Python 2 and
Python 3).
Some discussion in: https://github.com/python/typeshed/pull/460
* Add pytz basic typing
* Add pytz.lazy basic typing
* Move the files to the correct path
* Move files to correct directory
* Ignore issue with different sig from supertype
