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 acroForm = await this.pdfManager.ensureCatalog("acroForm");
    if (!acroForm) {
      return;
    }
    const resources = await acroForm.getAsync("DR");
    if (!(resources instanceof Dict)) {
      return;
    }
    const objectLoader = new ObjectLoader(resources, ["Font"], this.xref);
    await objectLoader.load();
    const fontRes = resources.get("Font");
    if (!(fontRes instanceof Dict)) {
      return;
    }
    const options = Object.assign(
      Object.create(null),
      this.pdfManager.evaluatorOptions
    );
    options.useSystemFonts = false;
    const partialEvaluator = new PartialEvaluator({
      xref: this.xref,
      handler,
      pageIndex: -1,
      idFactory: this._globalIdFactory,
      fontCache: this.catalog.fontCache,
      builtInCMapCache: this.catalog.builtInCMapCache,
      standardFontDataCache: this.catalog.standardFontDataCache,