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


const workerAMDName = "pdfjs-dist/build/pdf.worker";
  const workerOutputName = "pdf.worker.js";
  const workerFileConfig = createWebpackConfig(defines, {
    filename: workerOutputName,
    library: workerAMDName,
    libraryTarget: "umd",
    umdNamedDefine: true,
  });
  return gulp
    .src("./src/pdf.worker.js")
    .pipe(webpack2Stream(workerFileConfig))
    .pipe(replaceWebpackRequire())
    .pipe(replaceNonWebpackImport())
    .pipe(replaceJSRootName(workerAMDName, "pdfjsWorker"));
}
function createWebBundle(defines, options) {