Update license copyright to year 2021

jordansissel · jordansissel · commit 864e41c880c3 · 2021-07-06T14:32:08.000-07:00
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 (This is an MIT-style license)
 
-Copyright (c) 2011-2017 Jordan Sissel and contributors.
+Copyright (c) 2011-2021 Jordan Sissel and contributors.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
