update year in license file

wholmgren · web-flow · commit dc0d425b55b9 · 2021-02-15T15:58:15.000-07:00
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2013-2020, Sandia National Laboratories and pvlib python Development Team
+Copyright (c) 2013-2021, Sandia National Laboratories and pvlib python Development Team
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
