Update license year (#41087)

phofl · web-flow · commit 3513f59d487c · 2021-04-21T21:06:47.000-04:00
diff --git a/LICENSE b/LICENSE
@@ -3,7 +3,7 @@ BSD 3-Clause License
 Copyright (c) 2008-2011, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
 All rights reserved.
 
-Copyright (c) 2011-2020, Open source contributors.
+Copyright (c) 2011-2021, Open source contributors.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
