Ship Cargo.lock

[nshalman]

Thank you for writing this! I haven't even had a chance to play with it because I got nerd-sniped by trying to package it into nixpkgs first...

Per the removed comment:

# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html

Additional Reference: https://github.com/NixOS/nixpkgs/blob/master/doc/languages-frameworks/rust.section.md#buildrustpackage-compiling-rust-applications-with-cargo-compiling-rust-applications-with-cargo

Per the instructions in the Cargo Book best practices guide, Rust applications should always commit the Cargo.lock file in git to ensure a reproducible build. However, a few packages do not, and Nix depends on this file, so if it is missing you can use cargoPatches to apply it in the patchPhase. Consider sending a PR upstream with a note to the maintainer describing why it's important to include in the application.

[ynqa]

@nshalman Thanks for your contributing. LGTM! 👏