Add ability to specify ssl certificates

[gregoryduckworth]

In our development environment we have certificates to allow us access to some things we want protected. It would be great if this functionality could be supported (https://github.com/ariya/phantomjs/blob/466ae257a91a88200976e81f0668dc309329e518/src/config.cpp#L76-L78)

[betelgeuse]

Is there a way to do this with CDP? If not, support would first need to exist in the protocol.

https://chromedevtools.github.io/devtools-protocol/

The other option is that it's already supported to add chrome command line options so if this exists there it's automatically supported.