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
```
for (const dependency of dependencies) {
      this.addDependency(dependency);
    }
  }
  addOpList(opList) {
    if (!(opList instanceof OperatorList)) {
      warn('addOpList - ignoring invalid "opList" parameter.');
      return;
    }
    for (const dependency of opList.dependencies) {
      this.dependencies.add(dependency);
    }
    for (let i = 0, ii = opList.length; i < ii; i++) {
      this.addOp(opList.fnArray[i], opList.argsArray[i]);
    }
  }
  getIR() {
    return {
      fnArray: this.fnArray,
      argsArray: this.argsArray,
      length: this.length,
    };
  }
  get _transfers() {