Fix spelling of `dependOn`
Fix spelling of `dependOn`

The help text suggests using `dependsOn`, but the `s` is a typo.

The correct property is called `dependOn`: https://webpack.js.org/concepts/entry-points/#entrydescription-object
SimenB/webpack,webpack/webpack,webpack/webpack,webpack/webpack,SimenB/webpack,SimenB/webpack,SimenB/webpack,webpack/webpack