Verify selenium 4.12.0, and then ship a new seleniumbase release with it

[mdmintz]

Verify selenium 4.12.0, and then ship a new seleniumbase release with it

There were several changes, so everything should be checked carefully before upgrading dependencies.

Also include: #1979

[mdmintz]

This was resolved in 4.18.0 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.18.0

[mdmintz]

Note that a rollback occurred shortly after this release. Details: #2056