feat: Capture browser error

[robertsLando]

Should we add an event listener for console errors?

https://github.com/puppeteer/puppeteer/issues/1030#issuecomment-336495331

page.on("pageerror", client.onError}

page.on("error", client.onError)

The alternative would be to expose waPage as client parameter so users can do this their own and do more things like this