Fix test failures

[ahangarha]

Summary

This PR fixes some of the recent test failures.

Other Information

The change is based on the discussions in SeleniumHQ/selenium#13112.

Pull Request checklist

• Add/update test to cover these changes
• Update documentation
• Update CHANGELOG file

[G-Rath]

@ahangarha next thing to try would be to use headless=new, based on SeleniumHQ/selenium#13112

[G-Rath]

See #1328 (comment) - this looks like the fix for after updating selenium-webdriver but it still means the lockfiles are actually incorrect for Ruby 2.7, so I think we should land #1328 first then land this after a rebase + redoing the general update from #1302

[ahangarha]

If the issue is resolved (it seems it is) I close this PR.