Add PhantomJS as browser

[ws-hofshteyn]

https://github.com/lathonez/clicker/issues/247

[lathonez]

Hey,

Thanks a lot for the PR - really appreciate it.

I don't want to take anything into this repo outside of the realms of ng-cli - because it means I have to support it myself when it breaks.

E.g if ng-cli support phantom (upstream) this repo should also support phantom out of the box.

So either -

• point me at some ng-cli functionality for phantom that isn't working here
• make the PR upstream to ng-cli

Hope that makes sense.

Thanks again.

Stephen