Copyright for rust-async-oneshot source package in Oracular

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: async-oneshot
Upstream-Contact: James Laver 
Source: https://github.com/irrustible/async-oneshot

Files: *
Copyright: 2020-2023 James Laver 
License: MPL-2.0

Files: debian/*
Copyright:
 2023 Debian Rust Maintainers 
 2023 Arnaud Ferraris 
License: MPL-2.0

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