Configuration:
- PDF.js version: 2.0.550

Steps to reproduce the problem:
1. Render document in SVG mode `renderMode="svg"`

What is the expected behavior? (add screenshot)
Rendering annotations same way as they rendered on canvas

What went wrong? (add screenshot)
```
Warning: Unimplemented operator beginAnnotations
Warning: Unimplemented operator endAnnotations
```
if (
        typeof Worker !== "undefined" &&
        !isWorkerDisabled &&
        !getMainThreadWorkerMessageHandler()
      ) {
        let workerSrc = getWorkerSrc();
        try {
          
          
          if (
            typeof PDFJSDev !== "undefined" &&
            PDFJSDev.test("GENERIC") &&
            !isSameOrigin(window.location.href, workerSrc)
          ) {
            workerSrc = createCDNWrapper(
              new URL(workerSrc, window.location).href
            );
          }