Advisories for Cargo/Traitobject package

Crate traitobject has not had a release for over five years. In addition there is an existing security advisory that has not been addressed: RUSTSEC-2020-0027

An issue was discovered in the traitobject crate through 2020-06-01 for Rust. It has false expectations about fat pointers, possibly causing memory corruption in, for example, Rust 2.x.