Update copyright date on recently changed files

Author: jim-easterbrook

CHANGELOG.txt

@@ -1,6 +1,6 @@
 python-gphoto2 - Python interface to libgphoto2
 http://github.com/jim-easterbrook/python-gphoto2
-Copyright (C) 2014-20  Jim Easterbrook  jim@jim-easterbrook.me.uk
+Copyright (C) 2014-22  Jim Easterbrook  jim@jim-easterbrook.me.uk
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

README.rst

@@ -473,7 +473,7 @@ Licence
 
 | python-gphoto2 - Python interface to libgphoto2
 | http://github.com/jim-easterbrook/python-gphoto2
-| Copyright (C) 2014-21  Jim Easterbrook  jim@jim-easterbrook.me.uk
+| Copyright (C) 2014-22  Jim Easterbrook  jim@jim-easterbrook.me.uk
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

src/gphoto2/filesys.i

@@ -1,6 +1,6 @@
 // python-gphoto2 - Python interface to libgphoto2
 // http://github.com/jim-easterbrook/python-gphoto2
-// Copyright (C) 2014-21  Jim Easterbrook  jim@jim-easterbrook.me.uk
+// Copyright (C) 2014-22  Jim Easterbrook  jim@jim-easterbrook.me.uk
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by