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 transfers = [];
    const { fnArray, argsArray, length } = this;
    for (let i = 0; i < length; i++) {
      switch (fnArray[i]) {
        case OPS.paintInlineImageXObject:
        case OPS.paintInlineImageXObjectGroup:
        case OPS.paintImageMaskXObject:
          const arg = argsArray[i][0]; 
          if (
            typeof PDFJSDev === "undefined" ||
            PDFJSDev.test("!PRODUCTION || TESTING")
          ) {
            assert(
              arg.data instanceof Uint8ClampedArray,
              'OperatorList._transfers: Unsupported "arg.data" type.'
            );
          }
          if (!arg.cached) {
            transfers.push(arg.data.buffer);
          }
          break;
      }
    }
    return transfers;
  }
  flush(lastChunk = false) {