Npm `bin` field is not exported in published metadata

Try to publish a trivial npm package with a bin field:

    "name": "@user/package",
    "version": "1.0.0",
    "repository": {
        "type": "git",
        "url": "git://"
    "bin": "bin.js"

Then try to retrieve the related metadata from:

You’ll notice that the bin field has disappeared.

This behavior is very annoying when it comes to tools that rely on these metadata.
For example, yarn (berry) 2 is such a tool, and as a consequence, commands like yarn dlx do not work at all because of the lack of the bin field in the published metadata.

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