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


createBuildNumber,
    "locale",
    function scriptingMinifiedLegacy() {
      const defines = builder.merge(DEFINES, {
        MINIFIED: true,
        GENERIC: true,
        SKIP_BABEL: false,
      });
      return merge([
        buildDefaultPreferences(defines, "minified-legacy/"),
        createTemporaryScriptingBundle(defines),
      ]);
    },
    function createMinifiedLegacy() {
      console.log();
      console.log("### Creating minified (legacy) viewer");
      const defines = builder.merge(DEFINES, {
        MINIFIED: true,
        GENERIC: true,
        SKIP_BABEL: false,
      });
      return buildMinified(defines, MINIFIED_LEGACY_DIR);
    },
    async function compressMinifiedLegacy(done) {
      await parseMinified(MINIFIED_LEGACY_DIR);
      done();
    }
  )
);
function preprocessDefaultPreferences(content) {