doc: update readme

Author: drawcall

README.md

@@ -1,8 +1,11 @@
 <div align=center><img src="https://flutterkit.github.io/zerkerdocs/logo/logo.png"/></div>
+<br/>
 
+<div align=center>
 [![pub package](https://img.shields.io/pub/v/zerker.svg)](https://pub.dartlang.org/packages/zerker)
 [![Made-with-Flutter](https://img.shields.io/badge/Made%20with-Flutter-5fc9f8.svg)](https://flutter.dev/)
 [![Made-with-Dart](https://img.shields.io/badge/Made%20with-Dart-13589c.svg)](https://dart.dev/)
+</div>
 
 ## What is Zerker