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


return gulp.src(["external/bcmaps/*.bcmap", "external/bcmaps/LICENSE"], {
    base: "external/bcmaps",
  });
}
function createStandardFontBundle() {
  return gulp.src(
    [
      "external/standard_fonts/*.pfb",
      "external/standard_fonts/*.ttf",
      "external/standard_fonts/LICENSE_FOXIT",
      "external/standard_fonts/LICENSE_LIBERATION",
    ],
    {
      base: "external/standard_fonts",
    }
  );
}
function checkFile(filePath) {