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
```
const partialEvaluator = new PartialEvaluator({
      xref: this.xref,
      handler,
      pageIndex: this.pageIndex,
      idFactory: this._localIdFactory,
      fontCache: this.fontCache,
      builtInCMapCache: this.builtInCMapCache,
      standardFontDataCache: this.standardFontDataCache,
      globalImageCache: this.globalImageCache,
      options: this.evaluatorOptions,
    });
    
    
    return this._parsedAnnotations.then(function (annotations) {
      const newRefsPromises = [];
      for (const annotation of annotations) {
        if (!annotation.mustBePrinted(annotationStorage)) {
          continue;
        }
        newRefsPromises.push(
          annotation
            .save(partialEvaluator, task, annotationStorage)
            .catch(function (reason) {