Update README.md

Author: mpetuska

README.md

@@ -4,6 +4,7 @@
 [![Slack chat](https://img.shields.io/badge/kotlinlang-%23redux-green?logo=slack&style=flat-square)](https://kotlinlang.slack.com/archives/C8A8G5F9Q)
 [![Dokka docs](https://img.shields.io/badge/docs-dokka-orange?style=flat-square&logo=kotlin)](http://reduxkotlin.github.io/redux-kotlin-compose)
 [![Version maven-central](https://img.shields.io/maven-central/v/org.reduxkotlin/redux-kotlin-compose?logo=apache-maven&style=flat-square)](https://mvnrepository.com/artifact/org.reduxkotlin/redux-kotlin-compose/latest)
+[![Version maven-snapshot](https://img.shields.io/maven-metadata/v?metadataUrl=https%3A%2F%2Foss.sonatype.org%2Fcontent%2Frepositories%2Fsnapshots%2Forg%2Freduxkotlin%2Fredux-kotlin-compose%2Fmaven-metadata.xml&logo=apache-maven&label=maven-snapshot&style=flat-square)](https://oss.sonatype.org/content/repositories/snapshots/org/reduxkotlin/redux-kotlin-compose/)
 
 # Redux-Kotlin-Compose