fix(webpack): display sourcemaps in dev and limit bundle size warnings to prod only
fix(webpack): display sourcemaps in dev and limit bundle size warnings to prod only

This setting will allow for better debugging of errors by providing a more detailed source map in
the browser console. Since the devtool increases bundle size and generates warnings about bundle
sizing, these warnings will be turned off for dev but still present in prod.

cyrusinnovation/just-not-sorry,cyrusinnovation/just-not-sorry,cyrusinnovation/just-not-sorry