Google lighthouse option

[pmeenan]

@dbhatt Which options are you looking to configure specifically? Most of the options around device emulation and traffic-shaping are configured automatically based on the test parameters (enable mobile emulation for the WPT test and the same emulation carries into the lighthouse test).

Right now the --max-wait-for-load isn't being set but it makes sense to pass the WPT timeout setting through. Same goes for the WPT setting for additional chrome command-line switches.

The only other option that looks like you might want to tune would be which audits get run though I think it collects all of them by default.