feat: add unstable inheritance

[prabhatsharma]

This adds unstable inheritance to the package which allows generating sbom by running command like:

$ cargo-cyclonedx cyclonedx

and remove errors like below

The package requires the Cargo feature called `workspace-inheritance`, but that feature is not stabilized in this version of Cargo (1.63.0).
       Consider adding `cargo-features = ["workspace-inheritance"]` to the top of Cargo.toml (above the [package] table) to tell Cargo you are opting in to use this unstable feature.
       See https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#workspace-inheritance for more information about the status of this feature.