Updated version in docs

Author: esanchezros

README.adoc

@@ -1,5 +1,5 @@
 image:https://travis-ci.org/esanchezros/quickfixj-spring-boot-starter-examples.svg?branch=2.0.x["Build Status",link="https://travis-ci.org/esanchezros/quickfixj-spring-boot-starter-examples"]
-image:https://img.shields.io/badge/maven%20central-v2.6.0-blue.svg["Maven Central",link="https://search.maven.org/#search%7Cga%7C1%7Ca%3A%22quickfixj-spring-boot-starter-examples%22"]
+image:https://img.shields.io/badge/maven%20central-v2.8.3-blue.svg["Maven Central",link="https://search.maven.org/#search%7Cga%7C1%7Ca%3A%22quickfixj-spring-boot-starter-examples%22"]
 image:https://img.shields.io/hexpm/l/plug.svg["Apache 2",link="http://www.apache.org/licenses/LICENSE-2.0"]
 image:https://img.shields.io/badge/quickfixj-2.2.0-blue.svg["QuickFIX/J 2.2.0",link="https://github.com/quickfix-j/quickfixj"]