Update copyright year to 2022

LICENSE.md

-Copyright 2015-2021 Institute of Technical Acoustics (ITA), RWTH Aachen University
+Copyright 2015-2022 Institute of Technical Acoustics (ITA), RWTH Aachen University
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use files of this project except in compliance with the License.

README.md

@@ -5,7 +5,7 @@ VAPython contains is a C++ extension for the Python3 interpreter that provides a
 
 ### License
 
-Copyright 2015-2021 Institute of Technical Acoustics (ITA), RWTH Aachen University
+Copyright 2015-2022 Institute of Technical Acoustics (ITA), RWTH Aachen University
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use files of this project except in compliance with the License.

src/vasingleton.cpp

@@ -4,7 +4,7 @@
  *    VVV        VVV A           Virtual Acoustics (VA) | http://www.virtualacoustics.org
  *     VVV      VVV AAA          Licensed under the Apache License, Version 2.0
  *      VVV    VVV   AAA
- *       VVV  VVV     AAA        Copyright 2015-2021
+ *       VVV  VVV     AAA        Copyright 2015-2022
  *        VVVVVV       AAA       Institute of Technical Acoustics (ITA)
  *         VVVV         AAA      RWTH Aachen University
  *