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
```
assert(
      reason instanceof Error ||
        (typeof reason === "object" && reason !== null),
      'PDFPageProxy._abortOperatorList: Expected "reason" argument.'
    );
    if (!intentState.streamReader) {
      return;
    }
    if (!force) {
      
      
      if (intentState.renderTasks.size > 0) {
        return;
      }
      
      
      
      if (reason instanceof RenderingCancelledException) {
        intentState.streamReaderCancelTimeout = setTimeout(() => {
          this._abortOperatorList({ intentState, reason, force: true });