Update license date

Damian Rouson · Damian Rouson · commit 61e604cf1ff3 · 2020-06-09T08:06:20.000-07:00
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2016, Sourcery Institute
+Copyright (c) 2016-2020, Sourcery Institute
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
