Hot reloading seems broken on parcel-react-ssr example

[thomasjm]

Steps to reproduce:

1. Go to the parcel-react-ssr folder and run yarn install && yarn run dev
2. Click the link to go to http://localhost:1234/codeSplit
3. Try editing some text in parcel-react-ssr/app/HelloWorld2.js
4. Result: app fails to reload, and an error appears in the browser console:

react-imported-component: no import-marks found, please check babel plugin

Hot reloading works fine on the initial, non code-split page (HelloWorld.jsx).

(Also somewhat concerningly, I couldn't get the example to run at all when installing with npm install. It would throw various errors from the dev script unless I used yarn install.)