Always imports values as string

When I do this:
```js
/* foo.css */
@value numberOfColumns: 5;

/* foo.js */
import { numberOfColumns } from foo.css
```
the value of `numberOfColumns` will be a string (`"5"`) instead of a number. Is there a better way to make it a number than having to add

```js
/* foo.js continued */
const numberOfColumnsAsARealNumber = parseInt(numberOfColumns);
```