Bump version to v3.2.0

Change-Id: Icf1435b88c7f9d9a7dffec549bd9fb7311576d3d
diff --git a/build.gradle b/build.gradle
index ddef8b4..4cf7adc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,4 +5,4 @@
 }
 
 // Zentrale Projektversion für korapxmltool
-version = '3.1.3'
+version = '3.2.0'