Update README.md

Author: jonathanaustin

README.md

@@ -4,6 +4,7 @@ Reusable build configuration for for BorderTech open source projects.
 ## Status
 [![Build Status](https://travis-ci.com/BorderTech/java-common.svg?branch=master)](https://travis-ci.com/BorderTech/java-common)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/c7a2226acd574943af9ae966c54b05e6)](https://app.codacy.com/app/BorderTech/java-common?utm_source=github.com&utm_medium=referral&utm_content=BorderTech/java-common&utm_campaign=Badge_Grade_Dashboard)
+[![Maven Central](https://img.shields.io/maven-central/v/com.github.bordertech.common/bordertech-parent.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22com.github.bordertech.common%22%20AND%20a:%22bordertech-parent%22)
 
 ## qa-parent
 BorderTech java projects should generally use this as their parent POM.