Support deps.rs

[Icelk]

📋 Description

https://deps.rs provides a service to check dependency security status in Rust projects.
This will work for for all repos with a Cargo.toml.

"dependencies | 2 of 15 outdated" or "dependencies | insecure"

More examples can be found on https://deps.rs/.

🔗 Data

Will not require an API key.
A draft PR at deps-rs/deps.rs#122 implements this API.

🎤 Motivation

Several other package managers have dependency badges.
When the PR is merged, why not provide it to the Rust ecosystem?

https://deps.rs/ already support badges. They are however not as customizable.
Using one service (shields.io) is also more consistent.

[calebcartwright]

Sure, thanks for the request. We're happy to support this once the API becomes available so please drop a note here once that's complete and the work on our side can proceed.

For what it's worth we do already provide badges for other services in the Rust ecosystem including crates.io and docs.rs, the latter of which fairly recently started forwarding received badge requests directly over to our servers and were able to drop their own internal badge implementation (refs rust-lang/docs.rs#1362 and rust-lang/docs.rs#170)