add sponsors block to the README

README.md

@@ -571,3 +571,19 @@ e.g. a `OutOfMemoryError` will hinder your application to execute it's code and
 Exceptions are caused by the code of the application itself. The application knows this case could occur and can recover from it.
 
 e.g. a `ValidationException` will not store the data in your database, but will also not crash your application.
+
+<!---------------------------------------------------------------------------------------------------------->
+
+## Sponsors
+
+[Become a sponsor :heart:](https://github.com/sponsors/ivanhofer) if you want to support my open source contributions.
+
+<p align="center">
+   <a href="https://cdn.jsdelivr.net/gh/ivanhofer/sponsors/sponsorkit/sponsors.svg" title="ivanhofer's sponsors">
+      <img src="https://cdn.jsdelivr.net/gh/ivanhofer/sponsors/sponsorkit/sponsors.svg" alt="ivanhofer's sponsors" />
+   </a>
+</p>
+
+<p align="center">
+   Thanks for sponsoring my open source work!
+</p>