select-rustc no longer avaliable on crates.io

[MikeColeGuru]

I tried to use this crate but I was unable to because select-rustc is unavailable.

https://crates.io/crates/select-rustc

rust-analyzer failed to load workspace: Failed to read Cargo metadata from Cargo.toml file .../Cargo.toml, Some(Version { major: 1, minor: 64, patch: 0 }): Failed to run "cargo" "metadata" "--format-version" "1" "--manifest-path" ".../Cargo.toml" "--filter-platform" "x86_64-unknown-linux-gnu": cargo metadata exited with an error: Updating crates.io index error: no matching package named select-rustc found location searched: registry crates-io required by package mockers v0.21.0 ... which satisfies dependency mockers = "^0.21.0" of package (...)