Add Vue component link to readme

[AlexandreBonaventure]

Hi, love this plugin! I built a plugin to integrate it in Vue.js.
Maybe you want to put a link in the README file.
Here's the url : https://www.npmjs.com/package/vue-scrollmonitor

Keep me posted. Thanks.

[stutrek]

Thanks! I'll take a look and probably add a link. Until then I'll leave this issue open so other people can find it.