Browser tests: integrate sauce labs.

[ryan-roemer]

• Hook karma to sauce labs. Possible write up something like karma.conf.sauce.js
• Implement full browser matrix tests

[cdierkens]

Are we still interested in a larger browser matrix? Feels like we might be able to get tests running against FF, Safari, and Edge all in GH Actions at this point.

[ryan-roemer]

Maybe? And I think you’ve got the right idea of within gh actions and not using a cloud service like sauce