Unexpected token: operator (*)

I try to minify [sanitize.css here](https://github.com/csstools/sanitize.css/blob/master/sanitize.css) and getting this error message.

CSS:
```
*,
::before,
::after {
  box-sizing: border-box;
}
```

The line that contain *, is cause the error. This is normal CSS and should not cause any error.