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
```
if (
      typeof PDFJSDev === "undefined" ||
      PDFJSDev.test("!PRODUCTION || TESTING")
    ) {
      assert(
        this.data.defaultAppearanceData,
        "Expected `_defaultAppearanceData` to have been set."
      );
    }
    const { localResources, appearanceResources, acroFormResources } =
      this._fieldResources;
    const fontName =
      this.data.defaultAppearanceData &&
      this.data.defaultAppearanceData.fontName;
    if (!fontName) {
      return localResources || Dict.empty;