Prepare for v3.3.0

Change-Id: Idca4f005a485529673a2e33992cfe65e4b802a2e
diff --git a/build.gradle b/build.gradle
index f2bb849..3d26af9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,4 +5,4 @@
 }
 
 // Zentrale Projektversion für korapxmltool
-version = '3.2.1'
+version = '3.3.0'