Update command provides shell scripts that update many package managers and language-specific tools such as JavaScript NPM, Python Pip, Rust cargo, etc.

New in version 8:

* Add apk, cards, emerge, eopkg, flatpak, guix, nix, opkg, prt-get, slackpkg, urpmi, xbps.

* Add cargo project scripts and cargo-sweep. On my personal laptop cargo-sweep reclaimed 500GB of disk space.

Feedback encouraged.