Add linkSelector option

[woldtwerk]

Setting [data-cold] might not always be possible. It would be nice to have the option to opt-(out/in) using a selector.

Something like that:

const linkSelector = ':not(.some-class)'

if (!anchor.matches(linkSelector)) {
  return { type: 'disqualified' };
}

Any thoughts?

[prowebat]

maybe a more generic solution would be to allow a callback in the flamethrower config

const router = flamethrower({ 
  isLinkQualified: (anchor) => true; /* can return true or false */
});