Update the copyright notice in all files that have been modified this year.

Makefile

-# Copyright 2017-2020, Schlumberger
+# Copyright 2017-2021, Schlumberger
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

native/src/Makefile

-# Copyright 2017-2020, Schlumberger
+# Copyright 2017-2021, Schlumberger
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

native/src/api.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/bulk.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/bulk.h

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/compress_zfp.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/databuffer.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/databuffer.h

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/fancy_timers.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/fancy_timers.h

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file.h

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file_local.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file_performance.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file_performance.h

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file_sd.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file_smallcache.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/file_windows.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/lodalgo.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

native/src/impl/meta.cpp

-// Copyright 2017-2020, Schlumberger
+// Copyright 2017-2021, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.