Upstream updates

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. Fixes #6542
• Allow passing of service_args to Safari. Fixes #6459
• Remove element equals url
• Improved WebExtension support

Selenium 3.14.1

• Fix ability to set timeout for urllib3 (#6286)
• get_cookie uses w3c endpoint when compliant
• Remove body from GET requests (#6250)
• Fix actions pause for fraction of a second (#6300)
• Fixed input pausing for some actions methods
• Capabilities can be set on Options classes
• WebElement rect method is now forward compatible for OSS endpoints (#6355)
• Deprecation warnings now have a stacklevel of 2
• keep_alive can now be set on Webdriver init (#6316)
• isDisplayed atom is now used for all w3c compliant browser, fixing issue with Safari 12

Packaging updates

• convert to pyproject
• convert to rpmautospec
• ship LICENSE and CHANGES