chore(license): Update copyright notice to 2020 [ci skip] (#3568)

damingerdai · web-flow · commit 87f7e5eb02e9 · 2020-12-23T13:49:55.000-08:00
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (C) 2011-2019 Google, Inc.
+Copyright (C) 2011-2020 Google, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
