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
```
this.gfx.endDrawing();
          if (this._canvas) {
            canvasInRendering.delete(this._canvas);
          }
          this.callback();
        }
      }
    }
  }
  return InternalRenderTask;
})();
const version =
  typeof PDFJSDev !== "undefined" ? PDFJSDev.eval("BUNDLE_VERSION") : null;
const build =
  typeof PDFJSDev !== "undefined" ? PDFJSDev.eval("BUNDLE_BUILD") : null;
export {
  build,
  DefaultCanvasFactory,
  DefaultCMapReaderFactory,
  DefaultStandardFontDataFactory,
  getDocument,
  LoopbackPort,
  PDFDataRangeTransport,
  PDFDocumentProxy,
  PDFPageProxy,
  PDFWorker,
  setPDFNetworkStreamFactory,
  version,
};