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
```
case "range":
        rangeTransport = value;
        continue;
      case "worker":
        worker = value;
        continue;
      case "data":
        
        if (
          typeof PDFJSDev !== "undefined" &&
          PDFJSDev.test("GENERIC") &&
          isNodeJS &&
          typeof Buffer !== "undefined" && 
          value instanceof Buffer 
        ) {
          params[key] = new Uint8Array(value);
        } else if (value instanceof Uint8Array) {
          break; 
        } else if (typeof value === "string") {
          params[key] = stringToBytes(value);
        } else if (
          typeof value === "object" &&
          value !== null &&
          !isNaN(value.length)
        ) {
          params[key] = new Uint8Array(value);
        } else if (isArrayBuffer(value)) {
          params[key] = new Uint8Array(value);
        } else {
          throw new Error(