I've noticed I could use the pragmas in here as well and skip the `exclude: ["require-css/normalize"]`.

OBS:
- I have not tested this against anything but my personal case (https://github.com/rxaviers/require-css/tree/example);
- Could this be a solution to avoid users  to explicitly exclude this module? I mean can `css-builder.js` make use of an internal pragma to exclude normalize this way instead?