Objective
During work on #3009 I've found that not all jobs use actions-rs, and therefore, an previous version of Rust is used for them. So while compilation and other stuff can pass, checking markup and Android build may fail with compilation errors.
Solution
This PR adds `action-rs` for any job running cargo, and updates the edition to 2021.
Remove branch constraints from CI
This will let CI run on:
- fork branches before a PR is opened
- this repo branches if we start using them (😉 relations 😉 )
https://github.com/EmbarkStudios/cargo-deny
cargo-deny is a tool that can issue errors for dependency issues, among other:
* security issues in a crate
* duplicated dependencies with different versions
* unauthorised license
Added cargo-deny with an opinionated configuration:
* No middle ground with warnings, either allow or deny
* Not added to Bors, we probably don't want to block a PR on something that may happen from outside
* Different github workflow than CI to run only when Cargo.toml files are changed, or on a schedule
* Each check in its own job to help readability
* Initial config makes Bevy pass all check
Pushing a first commit with commented config to show errors
