Update copyright year

Correct an oversight and update the copyright year for the new development
done in 2017 and 2018.

Author: ColMelvin

README.md

@@ -36,7 +36,7 @@ Several simple transformation scripts use **sed**(1) to alter the format.  Check
 
 ## License and Copyright
 
-Copyright (C) 2012-2016  Chris Lindee
+Copyright (C) 2012-2018  Chris Lindee
 
 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

bin/git-svn-diff

@@ -672,7 +672,7 @@ should be the default and C<false> defaults to C<--no-show-nonexistent>.
 
 =head1 LICENSE AND COPYRIGHT
 
-Copyright (C) 2012-2016  Chris Lindee
+Copyright (C) 2012-2018  Chris Lindee
 
 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