prepare new version [ci skip]

Author: goekay

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>de.rwth.idsg</groupId>
     <artifactId>steve</artifactId>
-    <version>3.8.0</version>
+    <version>3.9.0-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>SteVe</name>