Add badges for more transparency, license & releases

I always liked the idea of badges to give a quick overview of the
"conditions" of a project. So, hereby this project now has it's license,
it's latest npm-version as well as the latest github-relase as badges.

Author: nemoinho

README.md

@@ -1,6 +1,9 @@
 # @nemoinho/comparator-js
 
 [![CI](https://ci.nehrke.info/api/v1/teams/main/pipelines/comparator-js/jobs/build/badge)](https://ci.nehrke.info/teams/main/pipelines/comparator-js?group=build)
+[![License](https://img.shields.io/github/license/nemoinho/comparator-js)](https://github.com/nemoinho/comparator-js/blob/main/LICENSE)
+[![NPM package](https://img.shields.io/npm/v/@nemoinho/comparator-js)](https://www.npmjs.com/package/@nemoinho/comparator-js)
+[![GitHub release](https://img.shields.io/github/v/release/nemoinho/comparator-js)](https://github.com/nemoinho/comparator-js/releases)
 
 Compare complex objects with ease.
 This library provides a simple API to create complex comparators and keep them understandable for humans.