Add :security/nvd alias

[joshrotenberg]

This adds the :security/nvd alias (and a new Security section) to deps.edn.

See https://github.com/rm-hull/nvd-clojure.

[practicalli-johnny]

Looks very useful, thank you.

I would like to have this as a tool (-T) as well, although I haven't started down that path yet (soon though). I think that will be adding a tools/ directory to this configuration which contains the edn files from installed files.