Upgrade the selenium libraries to their latest version

[beercanx]

The selenium versions are getting quite stale now and they need upgrading to provide better support and enable more browser types.

[iantmoore]

it's easy enough to upgrade the versions in use on a specific project though.

[beercanx]

Certain things break on the latest version, such as HtmlUnit, plus things like Edge are currently not available currently if I remember correctly.