Copyright for rust-simplecss source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: simplecss
Upstream-Contact: Evgeniy Reizner 
Source: https://github.com/RazrFalcon/simplecss

Files: *
Copyright: 2016—2017 Evgeniy Reizner 
License: MPL-2.0

Files: debian/*
Copyright:
 2019 Debian Rust Maintainers 
 2019 Andrej Shadura 
License: MPL-2.0

License: MPL-2.0
 Debian systems provide the MPL 2.0 in /usr/share/common-licenses/MPL-2.0