Copyright for soundconverter source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: soundconverter
Upstream-Contact: Gautier Portet 
Source: https://github.com/kassoulet/soundconverter

Files: *
Copyright: 2004, Lars Wirzenius 
           2005-2018, Gautier Portet 
License: GPL-3

Files: data/soundconverter-logo.svg
       data/soundconverter.png
       data/soundconverter.svg
Copyright: public-domain
License: public-domain
 See commit 7d90194a6aa86ce10dbcfa1faa0c6d488f535bcf in the upstream git
 repository.

Files: debian/*
Copyright: 2006-2008, William Grant 
           2009, Jason Heeris 
           2014, Lars Wirzenius 
           2015-2018, Sebastian Ramacher 
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 as published by the
 Free Software Foundation; version 3 of the License.
 .
 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 can be found in the `/usr/share/common-licenses/GPL-3'
 file.