Feature request: search for .npmrc upwards

[thernstig]

Currently if I am adding a .npmrc upwards in my directory hierarchy, npm does not find it. It would be good if it could search upwards.
That would also help in situations like npm/rfcs#343 where you migth have specified an .npmrc in the root but not in the workspace.

.npmrc files in a workspace then should take precedence.

[ruyadorno]

@thernstig Thanks for taking the time to share your idea! While new ideas are always appreciated I would please ask you to open an issue or discussion in our RFC repo instead since that's the right place for those in order to get more attention from the rest of the team and the community. 😊

Thanks again and all the best!