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 obj = this.pageDict.get("UserUnit");
    if (!isNum(obj) || obj <= 0) {
      obj = DEFAULT_USER_UNIT;
    }
    return shadow(this, "userUnit", obj);
  }
  get view() {
    
    
    
    
    const { cropBox, mediaBox } = this;
    let view;
    if (cropBox === mediaBox || isArrayEqual(cropBox, mediaBox)) {
      view = mediaBox;
    } else {
      const box = Util.intersect(cropBox, mediaBox);
      if (box && box[2] - box[0] !== 0 && box[3] - box[1] !== 0) {
        view = box;
      } else {
        warn("Empty /CropBox and /MediaBox intersection.");
      }
    }
    return shadow(this, "view", view || mediaBox);
  }
  get rotate() {