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Fails to load polyfill using native node ESM #110

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@perrin4869

Description

@perrin4869

Reproducible on latest node 16.3.0:

❯ cat package.json
{
  "type": "module",
  "devDependencies": {
    "cross-fetch": "^3.1.4"
  }
}
❯ cat index.js
import "cross-fetch/polyfill";
❯ node --experimental-specifier-resolution=node index.js
node:internal/process/esm_loader:74
    internalBinding('errors').triggerUncaughtException(
                              ^

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/home/perrin4869/univapay/cross-fetch-esm/node_modules/cross-fetch/polyfill' imported from /home/perrin4869/univapay/cross-fetch-esm/index.js
Did you mean to import cross-fetch-esm/node_modules/cross-fetch/dist/node-polyfill.js?
    at new NodeError (node:internal/errors:363:5)
    at finalizeResolution (node:internal/modules/esm/resolve:296:11)
    at moduleResolve (node:internal/modules/esm/resolve:742:10)
    at Loader.defaultResolve [as _resolve] (node:internal/modules/esm/resolve:853:11)
    at Loader.resolve (node:internal/modules/esm/loader:89:40)
    at Loader.getModuleJob (node:internal/modules/esm/loader:242:28)
    at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:73:40)
    at link (node:internal/modules/esm/module_job:72:36) {
  code: 'ERR_MODULE_NOT_FOUND'
}

Not sure if this should be treated as a node bug or as a cross-fetch bug though...

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