request: add support for other repositories

[Th3S4mur41]

Is your feature request related to a problem? Please describe.

I'd like to deprecate packages published on the GitHub registry.
I have the .npmrc configured to map the package accordingly

@my-scope:registry=https://npm.pkg.github.com

So the regular npm deprecate command is correctly addressing that registry.
This package however uses a hard coded npmjs reference.

Describe the solution you'd like

Use the registry from npm configuration

Describe alternatives you've considered

Less ideal, but add a config parameter to let the user pass the target registry as argument

[favna]

I'm afraid there is not much I can do for you here. This package uses NPM's own npm-registry-fetch which is sadly more convoluted than just a tiny fetch wrapper for the API routes and I did initially try to do manual fetch calls but for some bizarre reasons they kept being rejected and when I used wireshark between that and when using npm-registry-fetch the exact same calls were being made.

I'm open to PRs refactoring out npm-registry-fetch and replacing it with regular undici fetch but I'm not very inclined to try that struggle again.