BREAKING CHANGE: the `django` plugin was deprecated in 2021-09-22. With
this change it has now been removed altogether. Zsh already provides
built-in completion for Django commands.

Co-authored-by: Matthias Doering <matthias.doering@teamix.de>

BREAKING CHANGE: the `npx` plugin used a feature of `npx` to check for
npm packages and run them if a command was not found. This feature was
removed in v7.0.0 and was deemed insecure. The `npx` plugin is now
officially deprecated and will be removed soon.

Fixes #10452

Fixes #9737

Fixes missing $USER value in ArchLinux sh (bash)

Co-authored-by: Marc Cornellà <hello@mcornella.com>

Closes #4962

Closes #6555

Co-authored-by: Mike Mattice <mmattice@reliant.io>

Fixes #10587