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
```
(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) && isNodeJS
    ? NodeCMapReaderFactory
    : DOMCMapReaderFactory;
const DefaultStandardFontDataFactory =
  (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) && isNodeJS
    ? NodeStandardFontDataFactory
    : DOMStandardFontDataFactory;
/**
 * @typedef {function} IPDFStreamFactory
 * @param {DocumentInitParameters} params - The document initialization
 *   parameters. The "url" key is always present.
 * @returns {Promise} A promise, which is resolved with an instance of
 *   {IPDFStream}.
 * @ignore
 */
/**
 * @type IPDFStreamFactory
 * @private
 */
let createPDFNetworkStream;
/**
 * Sets the function that instantiates an {IPDFStream} as an alternative PDF
 * data transport.
 *
 * @param {IPDFStreamFactory} pdfNetworkStreamFactory - The factory function
 *   that takes document initialization parameters (including a "url") and
 *   returns a promise which is resolved with an instance of {IPDFStream}.
 * @ignore
 */
function setPDFNetworkStreamFactory(pdfNetworkStreamFactory) {