Complete rewrite of the library
* Add support for manipulating Property, Lexeme and Wikimedia Commons MediaInfo
* Rewrite the wbi_login module, each authentification method has now is own class.
* Add support for Structured Data on Commons (SDC).
* Replace custom debug with `logging` module.
* Add type hints.
* Remove WikibaseIntegrator.wbi_helpers property. Use directly wbi_helpers module instead.
* Improve datatypes code by removing redundant parts
* Improve useragent support.
Thanks to dpriskorn , pgrond , jmformenti