Add Ethereum name or address to package.json

I would like to see an Ethereum name or address added to the `ethereum` field of the package.json file. This will allow consumers of the project to know a cannonical address to send funds to, for example donations.

I'm building an application that will allow developers to automatically donate ETH to all of their npm dependencies that have Ethereum addresses in their package.json files. I'm not quite ready to share the project, but I'd love to see an Ethereum address in this project's package.json file.

Start by inspecting package.json and confirm the expected ethereum field format. The issue does not identify an approved Ethereum name or address, so clarify which canonical recipient the project wants before editing; done means package.json contains the maintainer-approved value and remains valid JSON.

Written by the indexing model from the issue text.