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
```
iTransform = iFirstTransform;
      for (let q = 0; q < count; q++, iTransform += 4) {
        transformArgs = argsArray[iTransform];
        positions[q << 1] = transformArgs[4];
        positions[(q << 1) + 1] = transformArgs[5];
      }
      
      fnArray.splice(iFirstSave, count * 4, OPS.paintImageMaskXObjectRepeat);
      argsArray.splice(iFirstSave, count * 4, [
        firstPIMXOArg0,
        firstTransformArg0,
        firstTransformArg1,
        firstTransformArg2,
        firstTransformArg3,
        positions,
      ]);
    } else {
      count = Math.min(count, MAX_IMAGES_IN_MASKS_BLOCK);
      const images = [];
      for (let q = 0; q < count; q++) {
        transformArgs = argsArray[iFirstTransform + (q << 2)];
        const maskParams = argsArray[iFirstPIMXO + (q << 2)][0];
        images.push({
          data: maskParams.data,
          width: maskParams.width,
          height: maskParams.height,
          transform: transformArgs,
        });
      }