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
```
docBaseUrlAnnotations,
        invalidDocBaseUrlAnnotations,
      ] = await Promise.all([
        defaultPromise,
        docBaseUrlPromise,
        invalidDocBaseUrlPromise,
      ]);
      expect(defaultAnnotations[0].url).toBeUndefined();
      expect(defaultAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );
      expect(docBaseUrlAnnotations[0].url).toEqual(
        "http://www.example.com/0021/002156/215675E.pdf#15"
      );
      expect(docBaseUrlAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );
      expect(invalidDocBaseUrlAnnotations[0].url).toBeUndefined();
      expect(invalidDocBaseUrlAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );
      await Promise.all([
        defaultLoadingTask.destroy(),
        docBaseUrlLoadingTask.destroy(),
        invalidDocBaseUrlLoadingTask.destroy(),
      ]);
    });
    it("gets text content", async function () {
      const defaultPromise = page.getTextContent();
      const parametersPromise = page.getTextContent({