Copyright for tl-expected source package in Kinetic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: expected
Upstream-Contact: Simon Brand 
Source: https://github.com/TartanLlama/expected
Files-Excluded: tests/catch.hpp
Comment: Remove autogenerated Catch2 header with no sources in Debian.

Files: *
License: CC0-1.0
Copyright: 2017, Simon Brand 

Files: debian/*
License: CC0-1.0
Copyright: 2020, Nicholas Guriev 

Files: debian/tl-cmake/*
License: CC0-1.0
Copyright: 2017, Simon Brand 

License: CC0-1.0
 To the extent possible under law, the author(s) have dedicated all
 copyright and related and neighboring rights to this software to the
 public domain worldwide. This software is distributed without any warranty.
 .
 You should have received a copy of the CC0 Public Domain Dedication
 along with this software. If not, see
 .
 .
 On Debian-like systems, full text of the license is available in
 .