debian/copyright: update copyright years
authorAntonio Ospite <ao2@ao2.it>
Sat, 3 Mar 2018 14:33:46 +0000 (15:33 +0100)
committerAntonio Ospite <ao2@ao2.it>
Sat, 3 Mar 2018 14:33:46 +0000 (15:33 +0100)

No differences found