Log Message:
py-selenium: updated to 3.141.0

Selenium 3.141.0
* Bump version to a better approximation of Π
* Improved Test build targets
* fix os path in test for Windows
* use 'NUL' for /dev/null on Windows
* Update ctor docstrings to explain that a directory passed in is cloned.
* Allow passing of service_args to Safari.
* Remove element equals url
* Improved WebExtension support