@adobe/fetch Headers can not be used as it is missing in Polyfill

[maximilianvoss]

Expected Behaviour

@adobe/fetch Headers can be used

Actual Behaviour

breaks due to missing in Polyfill

Reproduce Scenario (including but not limited to)

missing dependency

Steps to Reproduce

build a project and include new Headers from @adobe/fetch

Platform and Version

• Cloudflare
• Fastly

Sample Code that illustrates the problem

import { Headers} from "@adobe/fetch";
export async function main(request, context) {
  const headers = new Headers({});
}

Logs taken while reproducing problem

_adobe_fetch__WEBPACK_IMPORTED_MODULE_0__.Headers is not a constructor","stack":"$5413b4e374f939b6$export$a92b506d6c85facb@<stdin>:4494:23
$051f64557a3fd257$export$5817729456681d0a@<stdin>:4520:23
main@<stdin>:11074:41
async*handler@<stdin>:376:46