In Webpack 5, the [recommended way](https://webpack.js.org/guides/web-workers/) to create a web worker is

```ts
new Worker(new URL('./worker.js', import.meta.url));
```

Could we update\* the [`pdfjs-dist/webpack` entrypoint](https://github.com/mozilla/pdfjs-dist/blob/master/webpack.js) to use this syntax instead of the legacy `worker-loader`? One of the Webpack contributors told me that `worker-loader` uses "magic" and can cause issues.

\* To maintain compatibility with people still using Webpack 4, we should probably introduce a new entrypoint called `pdfjs-dist/webpack5` (or something like that) rather than changing the existing entrypoint.

Can attempt a PR if you would like.

Closely-related: https://github.com/mozilla/pdf.js/issues/15302


process.env.TESTING = "true";
  
  
  
  process.env.TZ = "UTC";
  done();
}
gulp.task("dev-fitCurve", function createDevFitCurve() {
  console.log();
  console.log("### Building development fitCurve");
  const defines = builder.merge(DEFINES, { GENERIC: true, TESTING: true });
  const fitCurveDir = BUILD_DIR + "dev-fitCurve/";
  rimraf.sync(fitCurveDir);
  return createFitCurveBundle(defines).pipe(gulp.dest(fitCurveDir));
});
gulp.task(
  "test",
  gulp.series(
    setTestEnv,
    "generic",
    "components",
    "dev-fitCurve",