Update README.md

Author: tomFlidr

README.md

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 # Databasic - All Packages
 
-[![Latest Stable Version](https://img.shields.io/badge/Stable-v1.1.0-brightgreen.svg?style=plastic)](https://github.com/databasic-net/databasic-core/releases)
+[![Latest Stable Version](https://img.shields.io/badge/Stable-v1.2.0-brightgreen.svg?style=plastic)](https://github.com/databasic-net/databasic-core/releases)
 [![License](https://img.shields.io/badge/Licence-BSD3-brightgreen.svg?style=plastic)](https://raw.githubusercontent.com/databasic-net/databasic-core/master/LICENCE.md)
 ![.NET Version](https://img.shields.io/badge/.NET->=4.0-brightgreen.svg?style=plastic)