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
```
it("server allows cors with credentials, and withCredentials=true", async function () {
        await testCanLoad("basicapi.pdf?cors=withCredentials", {
          withCredentials: true,
        });
      });
      it("server allows cors with credentials, and withCredentials=false", async function () {
        
        
        
        
        await testCanLoad("basicapi.pdf?cors=withCredentials", {
          withCredentials: false,
        });
      });
    });
  });
  describe("Page", function () {
    let pdfLoadingTask, pdfDocument, page;
    beforeAll(async function () {
      pdfLoadingTask = getDocument(basicApiGetDocumentParams);
      pdfDocument = await pdfLoadingTask.promise;
      page = await pdfDocument.getPage(1);
    });
    afterAll(async function () {
      await pdfLoadingTask.destroy();
    });
    it("gets page number", function () {
      expect(page.pageNumber).toEqual(1);
    });
    it("gets rotate", function () {