Created by: ianschmitz
Closes #7782 (closed).
Updates webpack-dev-server from 3.2.1 to 3.9.0.
I was able to resolve the previous issues i experienced when trying the upgrade before in #7473. The error appears to be related to our usage of sockjs-client inside of the webpackHotDevClient and jsdom. Switching to using native a WebSocket instead made everything happy.
yarn start works nicely. Code changes cause page refresh, style changes causes a hot replacement of styles as expected, and error overlay works.
I tagged as a breaking change for react-dev-utils only as this change could potentially affect someone out there due to the change.