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
```
let type = "button";
    let exportValues;
    if (this.data.checkBox) {
      type = "checkbox";
      exportValues = this.data.exportValue;
    } else if (this.data.radioButton) {
      type = "radiobutton";
      exportValues = this.data.buttonValue;
    }
    return {
      id: this.data.id,
      value: this.data.fieldValue || "Off",
      defaultValue: this.data.defaultFieldValue,
      exportValues,
      editable: !this.data.readOnly,
      name: this.data.fieldName,
      rect: this.data.rect,
      hidden: this.data.hidden,
      actions: this.data.actions,
      page: this.data.pageIndex,
      type,
    };
  }
  get fallbackFontDict() {