Update copyright.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/cli/trunk@1439317 13f79535-47bb-0310-9956-ffa450edef68

Author: netomi

NOTICE.txt

@@ -1,5 +1,5 @@
 Apache Commons CLI
-Copyright 2001-2011 The Apache Software Foundation
+Copyright 2001-2013 The Apache Software Foundation
 
 This product includes software developed by
 The Apache Software Foundation (http://www.apache.org/).