Update versions

Author: nilols

pom.xml

@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.graphwalker</groupId>
     <artifactId>graphwalker-project</artifactId>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.1.0</version>
     <packaging>pom</packaging>
 
     <name>GraphWalker Project</name>