[mod] #252: Create helper to update the copyright year

update_copyright_year.sh

+#!/bin/fish
+
+# Script to update the copyright year in header files
+
+set NEW_YEAR (date +"%Y")
+set OLD_YEAR (math $NEW_YEAR - 1)
+sed -i "s/Copyright  2016-$OLD_YEAR M/Copyright  2016-$NEW_YEAR M/g" bin/silkaj silkaj/*.py tests/*.py