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
```
return this._transport.annotationStorage;
  }
  /**
   * @type {number} Total number of pages in the PDF file.
   */
  get numPages() {
    return this._pdfInfo.numPages;
  }
  /**
   * @type {Array<string, string|null>} A (not guaranteed to be) unique ID to
   *   identify the PDF document.
   *   NOTE: The first element will always be defined for all PDF documents,
   *   whereas the second element is only defined for *modified* PDF documents.
   */
  get fingerprints() {
    return this._pdfInfo.fingerprints;
  }
  /**
   * @type {boolean} True if only XFA form.
   */
  get isPureXfa() {