Laravel-mix spread operator: Unexpected token

I'm trying to use vue-admin with laravel-mix but every time I run npm run dev

It always fails with:

You may need an appropriate loader to handle this file type. | store, | nprogress, | ...App | }) |

I am aware of the one possible solution here: https://github.com/JeffreyWay/laravel-mix/issues/76

Tried node versions: 6.x, 7.x

But creating a .babelrc file with the plugin does not help. Is it possible, that somehow the babelrc is overwritten when compiling the vue-admin module?

Do I have to add a custom query to the webpack config?

.babelrc:

{
  "presets": [
    ["es2015", { "modules": false }]
  ],
  "plugins": ["transform-object-rest-spread"]
}

via Gazben