Bumped problem version

Author: Willi Schönborn

pom.xml

@@ -57,7 +57,7 @@
         <maven.compiler.target>1.8</maven.compiler.target>
 
         <spring.version>4.2.0.RELEASE</spring.version>
-        <problem.version>0.2.0</problem.version>
+        <problem.version>0.4.0</problem.version>
         <jackson.version>2.6.1</jackson.version>
     </properties>