TOML v1.1.0 support

[chirizxc]

Cargo already supports TOML v1.1.0 in nightly builds, so cargo check works locally, but it still doesn't work with maturin: https://github.com/lava-sh/yaml-rs/actions/runs/20854346581/job/59916844613?pr=52

[chirizxc]

But before updating, it seems we need to wait for the merge toml-rs/toml#1084 and new toml crate release.

[konstin]

The latest toml crate release has toml 1.1 support.