chore: more copyright updates

apps/emqx_exhook/priv/protos/exhook.proto

@@ -1,5 +1,5 @@
 //------------------------------------------------------------------------------
-// Copyright (c) 2020 EMQ Technologies Co., Ltd. All Rights Reserved.
+// Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

apps/emqx_exproto/priv/protos/exproto.proto

@@ -1,5 +1,5 @@
 //------------------------------------------------------------------------------
-// Copyright (c) 2020 EMQ Technologies Co., Ltd. All Rights Reserved.
+// Copyright (c) 2020-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

apps/emqx_rule_engine/README.md

@@ -39,7 +39,7 @@ select id, time, temperature as t from "topic/a" where t > 50;
 
 ## License
 
-Copyright (c) 2019 [EMQ Technologies Co., Ltd](https://emqx.io). All Rights Reserved.
+Copyright (c) 2019-2021 [EMQ Technologies Co., Ltd](https://emqx.io). All Rights Reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");you may not use this file except in compliance with the License.You may obtain a copy of the License at
 

test/emqx_request_responser_SUITE.erl

@@ -1,4 +1,4 @@
-%% Copyright (c) 2013-2019 EMQ Technologies Co., Ltd. All Rights Reserved.
+%% Copyright (c) 2013-2021 EMQ Technologies Co., Ltd. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.