[improvement] Run directly dep-tree via npx

[maxlerebourg]

To avoid having dep-tree inside our dependencies, try to deploy it and have a global script associated.
https://github.com/Haimantika/introduction-npm-package to know how to do it.

[gabotechs]

will look into this, thanks!

[gabotechs]

I've looked into it and it's actually possible right now, but the package in npm is not called just dep-tree (the name was chosen), it's called @dep-tree/cli, so you can run it using it's npm package name:

npx @dep-tree/cli