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
```
isString,
  OPS,
  PageActionEventType,
  shadow,
  stringToBytes,
  stringToPDFString,
  stringToUTF8String,
  unreachable,
  Util,
  warn,
} from "../shared/util.js";
import {
  clearPrimitiveCaches,
  Dict,
  isDict,
  isName,
  isRef,
  isStream,
  Name,
  Ref,
} from "./primitives.js";
import {
  collectActions,
  getInheritableProperty,
  isWhiteSpace,
  MissingDataException,
  validateCSSFont,
  XRefEntryException,
  XRefParseException,
} from "./core_utils.js";