InstallError: npm-check-updates fails to install

[raineorshine]

npm-check-updates

npm-check-updates

(cf npm-check which is no longer maintained and does work on bundlephobia)

Entire (stringified) error that I see in my browser console

{
    "error": {
        "code": "InstallError",
        "message": "Installing the packaged failed.",
        "details": {}
    }
}

Uploading the package.json suggests that update-notifier and yaml are breaking the build. These are both pure ESM.

This appears related to #530.