Upgrade packages to match www-main?

Following up after #1250 , we should consider updating js / npm packages (in https://github.com/cmu-delphi/www-covidcast/blob/dev/package.json ) to match those in https://github.com/cmu-delphi/www-main/ ...

Determine if this is feasible, and if so, make it happen!