Hi there,

The node example provided (https://github.com/mozilla/pdf.js/tree/master/examples/node) fails on node.js >= 16.7. I believe that's due to the fact that the runtime is checked via `URL.createObjectURL` in `legacy/build/pdf.js` (repo: https://github.com/mozilla/pdfjs-dist/blob/master/legacy/build/pdf.js#L2459) and the fact that it has been recently introduced in node 16.7 (see: https://nodejs.org/api/url.html#urlcreateobjecturlblob)

Configuration:
- Node.js 16.7 or 16.8
- PDF.js version: latest

Steps to reproduce the problem:
1. Run pdf.js node example with node 16.7 or later

Error:
`stack:'ReferenceError: Blob is not defined\n    at createObjectURL`

Thanks!
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function unreachable(msg) {
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function assert(cond, msg) {
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function isSameOrigin(baseUrl, otherUrl) {
  let base;
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    if (!base.origin || base.origin === "null") {
      return false; 
    }
  } catch (e) {
    return false;
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  const other = new URL(otherUrl, base);
  return base.origin === other.origin;
}
function _isValidProtocol(url) {