[Feat] Allow running chromium with headless=new

[sag1v]

In the latest changes of chromium there is an option to run it with headless=new rather than just false or true.

This new feature allow you to opt-in for the new chromium build, which is an identical build of the "real" chrome browser instead of a replica like it was up until now.

Storycap should allow passing the headless value to puppeteer.