Fix wrong version string

src/main/java/org/extendj/ragdoc/RagDocBuilder.java

@@ -174,7 +174,7 @@ public class RagDocBuilder extends Frontend {
   }
 
   @Override protected String version() {
-    return "2.0.0 SNAPSHOT";
+    return "1.3.0";
   }
 
   @Override protected void initOptions() {