Concept for multi-registry support in package.json

package.json

{
  "name": "my-app",
  "version": "1.0.0",
  "registries": {
    "npm": { "url": "registry.npmjs.org", "default": true },
    "tidelift": { "url": "registry.tidelift.org" },
    "acme-corp": { "url": "verdaccio.acme.corp" }
  },
  "dependencies": {
    "express": "^4.0.x",
    "*acme-corp/ui": "^1.0.4",
    "*tidelift/express-pro": "2.0.5"
  }
}

Vague idea, but yeah, this is a hard one especially if trying not to break backwards compatibility. Best I can figure is adding a separate sources field that can inline any of the registries info like above (which I really like the idea of) or just reference a name from one:

{
  "name": "my-app",
  "version": "1.0.0",
  "registries": {
    "npm": { "url": "registry.npmjs.org", "default": true },
    "tidelift": { "url": "registry.tidelift.org" },
    "acme-corp": { "url": "verdaccio.acme.corp" }
  },
  "dependencies": {
    "express": "^4.0.x",
    "ui": "^1.0.4",
    "express-pro": "2.0.5",
    "my-package": "1.0.0"
  },
  "sources": {
    "ui": "acme-corp",
    "express-pro": "tildelift",
    "my-package": {
      "git": "https://github.com/name/my-package"
    }
  }
}