Adjust version

Co-authored-by: Tjark Fischer <tjark.fischer@otto.de>

Author: MediaMarco

build.gradle

@@ -6,7 +6,7 @@ plugins {
     id("org.jreleaser") version "1.17.0"
 }
 
-version = '2.2.1-SNAPSHOT'
+version = '2.3.0-SNAPSHOT'
 group = 'de.otto'
 
 java {