Upgrade Selenium to 4.0.0

Selenium 4.0.0 will have proper support for Microsoft Edge (Chromium based), including support for the IE mode.

Notable (non-breaking) Changes:

• ExtendedEdgeOptions derives from EdgeOptions instead of ChromeOptions

• EdgeBrowserFactory.CreateEdgeDriver returns an EdgeDriver instance, creating using the ExtendedEdgeOptions

• EdgeBrowserFactory.CreateEdgeDriverService returns an EdgeDriverService instance

Other notable changes (from https://github.com/SeleniumHQ/selenium/blob/master/dotnet/CHANGELOG )

• Drivers supporting Logs will be marked with the ISupportsLogs interface.

• Updated to allow .NET to disable W3C mode for Chrome 75+. (Fixes )

• Added ability to install/uninstall Firefox add-ons.

• Added support for Chromium Edge.