Update README.md

README.md

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 [![build](https://github.com/heinerwalter/ngx-property-editor/actions/workflows/build-and-test.yml/badge.svg)](https://github.com/heinerwalter/ngx-property-editor/actions/workflows/build-and-test.yml)
 [![npm version](https://img.shields.io/npm/v/ngx-property-editor?logo=npm&logoColor=fff)](https://www.npmjs.com/package/ngx-property-editor)
+[![angular version](https://badgen.net/static/Angular/v17/c3002f?icon=angular)](https://v17.angular.io/docs)
 
 This is an Angular library containing simple input components for different data types
 (styled with bootstrap). Based on the input components this library provides a property