license: refresh ncurses license

Minor updates to years.

Author: indygreg

LICENSE.ncurses.txt

@@ -1,4 +1,5 @@
-Copyright (c) 1998-2017,2018 Free Software Foundation, Inc.
+Copyright 2018-2020,2021 Thomas E. Dickey
+Copyright 1998-2017,2018 Free Software Foundation, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the
@@ -23,3 +24,6 @@ Except as contained in this notice, the name(s) of the above copyright
 holders shall not be used in advertising or otherwise to promote the
 sale, use or other dealings in this Software without prior written
 authorization.
+
+-- vile:txtmode fc=72
+-- $Id: COPYING,v 1.10 2021/01/01 09:54:30 tom Exp $