Fixed copyright dates (#6109)

api4/reaction.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
 package api4

api4/reaction_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
 package api4

app/reaction.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
 package app

build/MIT-COMPILED-LICENSE.md

@@ -2,7 +2,7 @@ Mattermost MIT Compiled License
 
 **Note: this license does not cover source code, for information on source code licensing see LICENSE.txt in the Mattermost source code.
 
-Copyright (c) 2016 Mattermost, Inc.
+Copyright (c) 2016-present Mattermost, 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 the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: