Updates version to 1.3.1

Signed-off-by: Frank Schnicke <[email protected]>

Author: FrankSchnicke

pom.xml

@@ -5,7 +5,7 @@
 
 	<groupId>org.eclipse.basyx</groupId>
 	<artifactId>basyx.sdk</artifactId>
-	<version>1.4.0-SNAPSHOT</version>
+	<version>1.3.1</version>
 	<name>BaSyx SDK</name>
 	<description>BaSyx Software Development Kit</description>
 	<url>https://www.eclipse.org/basyx/</url>