Bump version to v3.0.0

Change-Id: I01287a1c7a025b65d4bc988beff495b3b227a858
diff --git a/build.gradle b/build.gradle
index 5c44ae4..f905e80 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,4 +5,4 @@
 }
 
 // Zentrale Projektversion für korapxmltool
-version = '3.00-rc3'
+version = '3.0.0'