Re-vendoring
============
Under the Ubuntu MIR policy, Rust packages in main need their dependencies
vendored.

https://canonical-ubuntu-project.readthedocs-hosted.com/MIR/mir-rust/

Prerequisites
=============
sudo apt install cargo-vendor-filterer dh-cargo-tools dpkg-dev git quilt

Updating vendored crates
========================
1. Run:
$ debian/rules vendor

It automatically creates three commits if successful
