Bump copyright year to 2020

AnonymousArthur · wangyaju · commit b0aab85896ef · 2020-03-24T19:57:52.000+08:00
diff --git a/LICENSE b/LICENSE
@@ -1,7 +1,7 @@
 MIT License
 
-Copyright (c) 2019 DevUI.
-Copyright (c) 2019 Huawei Technologies Co., Ltd.
+Copyright (c) 2020 DevUI.
+Copyright (c) 2020 Huawei Technologies Co., Ltd.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
