Add support for v57

[yonas]

Describe your use case

error: unsupported rustdoc format v57 for file: /home/yonas/git/rust-ci-github-actions-workflow/target/semver-checks/local-test2-0_1_0-default-eb4e7dd28f6262a4/target/doc/test2.json
(supported formats are v53, v55, v56)

Describe the solution you'd like

Add support for v57.

Alternatives, if applicable

No response

Additional Context

No response

[obi1kenobi]

Hi! cargo-semver-checks has no SLA for supporting not-yet-stable Rust versions. Latest stable is using v56. v57 won't be in stable until Rust 1.93 in another month, and there will be a new cargo-semver-checks release at some point before then.

Paid support contracts are available for projects that need to use cargo-semver-checks on beta or nightly Rust.

[robertbastian]

This now fails on stable.

[tnull]

This now fails on stable.

Seems fixed by today's release.