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!
/* Any copyright is dedicated to the Public Domain.
 * http:creativecommons.org/publicdomain/zero/1.0/ */
const fs = require("fs");
const util = require("util");
const path = require("path");
const stream = require("stream");
require("./domstubs.js").setStubs(global);
const pdfjsLib = require("pdfjs-dist/legacy/build/pdf.js");
const CMAP_URL = "../../node_modules/pdfjs-dist/cmaps/";
const CMAP_PACKED = true;
const pdfPath =
  process.argv[2] || "../../web/compressed.tracemonkey-pldi-09.pdf";
const data = new Uint8Array(fs.readFileSync(pdfPath));
const outputDirectory = "./svgdump";
try {
  
  
  fs.mkdirSync(outputDirectory);
} catch (e) {
  if (e.code !== "EEXIST") {
    throw e;
  }
}
function getFilePathForPage(pageNum) {