Copyright for rust-protobuf-codegen source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: protobuf-codegen
Upstream-Contact: Stepan Koltsov 
Source: https://github.com/stepancheg/rust-protobuf/

Files: *
Copyright: 2019 Stepan Koltsov 
License: MIT

Files: debian/*
Copyright:
 2019 Debian Rust Maintainers 
 2019 Ximin Luo 
License: MIT

License: MIT
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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