additional badges for kotlin and avro

README.md

@@ -2,9 +2,11 @@
 An ecosystem for using Apache Avro as serialization format for Axon messages.
 
 [![incubating](https://img.shields.io/badge/lifecycle-INCUBATING-orange.svg)](https://github.com/holisticon#open-source-lifecycle)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.holixon.axon.avro/axon-avro/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.holixon.axon.avro/axon-avro)
 [![Build Status](https://github.com/holixon/axon-avro/workflows/Development%20branches/badge.svg)](https://github.com/holixon/axon-avro/actions)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.0.0-blue.svg?logo=kotlin)](http://kotlinlang.org)
+[![Avro spec](https://img.shields.io/badge/avro%20spec-1.11.3-blue.svg?logo=apache)](https://avro.apache.org/docs/1.11.3/specification/)
 [![sponsored](https://img.shields.io/badge/sponsoredBy-Holisticon-RED.svg)](https://holisticon.de/)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.holixon.axon.avro/axon-avro/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.holixon.axon.avro/axon-avro)
 
 ## Modules
 
@@ -13,4 +15,4 @@ We plan to have several modules here:
 * Axon Serializer
 * Registry abstractions and implementations
 * Axon Server Plugin
-* Generators: for code generation around Avro
+* Generators: for code generation around Avro