Update copyright year

Author: jarun

README.md

@@ -246,5 +246,5 @@ optional arguments:
 
 ### Developers
 
-1. Copyright © 2016-2022 [Arun Prakash Jana](https://github.com/jarun)
+1. Copyright © 2016-2023 [Arun Prakash Jana](https://github.com/jarun)
 2. [Ananya Jana](https://github.com/ananyajana)

imgp

@@ -2,7 +2,7 @@
 #
 # Resize or rotate JPEG and PNG images.
 #
-# Copyright © 2016-2022 Arun Prakash Jana <engineerarun@gmail.com>
+# Copyright © 2016-2023 Arun Prakash Jana <engineerarun@gmail.com>
 #
 # 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
@@ -460,7 +460,7 @@ class ExtendedArgumentParser(argparse.ArgumentParser):
 
         file.write('''
 Version %s
-Copyright © 2016-2022 Arun Prakash Jana <engineerarun@gmail.com>
+Copyright © 2016-2023 Arun Prakash Jana <engineerarun@gmail.com>
 License: GPLv3
 Webpage: https://github.com/jarun/imgp
 ''' % _VERSION_)

imgp.1

@@ -214,7 +214,7 @@ Arun Prakash Jana <engineerarun@gmail.com>
 .SH REPORTING BUGS
 .I https://github.com/jarun/imgp/issues
 .SH LICENSE
-Copyright \(co 2016-2022 Arun Prakash Jana <engineerarun@gmail.com>
+Copyright \(co 2016-2023 Arun Prakash Jana <engineerarun@gmail.com>
 .PP
 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
 .br