copyright year

build.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  Copyright (c) 1995-2019 held by the author(s).  All rights reserved.
+  Copyright (c) 1995-2020 held by the author(s).  All rights reserved.
                           
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions