Add headroom external library to composer.js

I've tried adding the following to my composer.json file to download and install the Headroomjs library into my project like the rest of my external libraries.

"type": "package",
      "package": {
        "name": "wickynilliams/headroomjs",
        "version": "0.9.4",
        "type": "drupal-library",
        "extra": {
          "installer-name": "headroomjs"
        },
        "dist": {
          "url": "https://github.com/WickyNilliams/headroom.js",
          "type": "git"
        }
      }

I ran composer install but the library didn't install.

I also searched on Packagist and found weprovide/magento2-module-headroom and tried including that, but that didn't work either.

Am I missing something? Or are we simply not able to install the library this way?