Installing tool dependencies (metapackage support)

[jnm2]

@mholo65 #2318 (comment):

@ChrisMaddock @jnm2, regarding metapackages and #tool, feel free to open another issue to discuss it further. I think it would be a good idea to support, hence here’s the code in case anyone needs a PR for hacktoberfest 😉

Are there any downsides to installing all tool dependencies?

[devlead]

Are there any downsides to installing all tool dependencies?

No, we just need to make sure tools are resolved in all downloaded packages.