GHSA-7pwq-f4pq-78gm: `rustdecimal` is a malicious crate

The Rust Security Response WG and the crates.io team [were notified][1] on 2022-05-02 of the existence of the malicious crate rustdecimal, which contained malware. The crate name was intentionally similar to the name of the popular [rust_decimal][2] crate, hoping that potential victims would misspell its name (an attack called “typosquatting”).

To protect the security of the ecosystem, the crates.io team permanently removed the crate from the registry as soon as it was made aware of the malware. An analysis of all the crates on crates.io was also performed, and no other crate with similar code patterns was found.

Keep in mind that the [rust_decimal][2] crate was not compromised, and it is still safe to use.