4.45.3 - Base Chromium support

Base Chromium support

• Add support for base "Chromium"
  --> This resolves #4174
• Refresh Python dependencies
• Update the docs

New Features:

sbase get chromium downloads Chromium to the seleniumbase/chromium_drivers/ folder.
In scripts, use Chromium via use_chromium=True, or --use-chromium on the command-line.
(Unlike Chrome 142+, Chromium still allows extensions with the --load-extension switch.)
In SeleniumBase, use extension_dir="DIR1,DIR2" / --extension-dir="DIR1,DIR2" to load.

What's Changed

• Base Chromium support by @mdmintz in #4175

Full Changelog: v4.45.2...v4.45.3