Copyright for light source package in Sid

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: light
Source: https://github.com/haikarainen/light

Files: *
Copyright: 2012-2018 Fredrik Haikarainen 
License: GPL-3

Files: debian/*
Copyright: 2018 Joachim Nilsson 
           2019 Samuel Henrique 
License: GPL-3

License: GPL-3
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License version 3 as
 published by the Free Software Foundation.
 .
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 .
 On Debian systems, the full text of the GNU General Public
 License version 3 can be found in the file
 `/usr/share/common-licenses/GPL-3'.