Turns on hot loading, and does a bit of magic to work correctly for
react apps. Only use in development.
$3
| Property | Type | Default | Description |
| ------------- | -----------| -------------| ---------------------------------|
| preEntry | arrayOf(string)| ['react-hot-loader/patch'] | Hot loader patch|
| hot | bool | true | Turn on hot loading |
| inline | bool | true | Inlining |