upgrade rustsec to 0.30.0

Summary:
https://fb.workplace.com/groups/rust.language/posts/27576439711977949

`rustsec` depends on `cargo-lock` which needs upgrading to handle version 4 of lockfiles.

Differential Revision: D67501288

fbshipit-source-id: 8b380a03ba7c3fe97a74384f9c16987178cfb2d3

Author: capickett