Publish usable module on npm

I noticed that the detector has been published to npm in https://github.com/johnmichel/Library-Detector-for-Chrome/issues/98 but the file does not contain any exports and thus it cannot be imported:

typeof require('js-library-detector') === 'undefined'

It'd be great to see:

module.exports = or export default
some documentation (the published readme file talks about the extension instead of the library)

Here's the published content:

johnmichel / Library-Detector-for-Chrome