Copyright for python-fastimport source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: python-fastimport
Upstream-Contact: Jelmer Vernooij 
Source: https://launchpad.net/python-fastimport

Files: *
Copyright: Copyright (C) 2008-2012 Canonical Ltd
Authors: Ian Clatworthy, Jelmer Vernooij and others
License: GPL-2+

Files: debian/*
Copyright: Copyright (C) 2008-2010 Jelmer Vernooij 
License: GPL-2+

License: GPL-2+
 On Debian systems the full text of the GNU General Public License version 2
 can be found in the `/usr/share/common-licenses/GPL-2' file.