Support for Web Authentication and virtual authenticators

[mudge]

We currently make use of Selenium's Virtual Authenticator via selenium-webdriver's VirtualAuthenticator to test adding a hardware security key to our application using Webauthn. Is there a way to expose a similar API in Ferrum?

[route]

All is doable, depends on time and human resources. I think it's not going to be my main priority as there are more basic things to finish and implement, but I'll gladly merge any work from you or anyone else on this topic, after all it's same ruby language and OSS so we can copy paste some of the work from other projects.