message: Error if depending on a crate that has been yanked.
  A yanked crate is quite uncommon and usually reflects a serious problem.
diff: @@ -40,7 +40,7 @@ vulnerability = "deny"
  # The lint level for unmaintained crates
  unmaintained = "warn"
  # The lint level for crates that have been yanked from their source registry
  -yanked = "warn"
  +yanked = "deny"
  # The lint level for crates with security notices. Note that as of
  # 2019-12-17 there are no security notice advisories in
  # https://github.com/rustsec/advisory-db
  