[maven-release-plugin] prepare release java-object-diff-0.13

Author: SQiShER

Diff for: pom.xml

@@ -27,7 +27,7 @@
     <groupId>de.danielbechler</groupId>
     <artifactId>java-object-diff</artifactId>
     <name>Java Object Diff</name>
-    <version>0.13-SNAPSHOT</version>
+    <version>0.13</version>
 
     <developers>
         <developer>