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
```
pdfManagerMock,
        idFactoryMock
      
      expect(data.annotationType).toEqual(AnnotationType.WIDGET
      expect(data.checkBox).toEqual(true
      expect(data.fieldValue).toEqual("1"
      expect(data.defaultFieldValue).toEqual("2"
      expect(data.radioButton).toEqual(false
    }
    it("should handle checkboxes without /Off appearance", async function () {
      buttonWidgetDict.set("V", Name.get("1")
      buttonWidgetDict.set("DV", Name.get("2")
      const appearanceStatesDict = new Dict(
      const normalAppearanceDict = new Dict(
      normalAppearanceDict.set("Checked", 1
      appearanceStatesDict.set("N", normalAppearanceDict
      buttonWidgetDict.set("AP", appearanceStatesDict
      const buttonWidgetRef = Ref.get(124, 0
      const xref = new XRefMock([
        { ref: buttonWidgetRef, data: buttonWidgetDict },
      ]
      const { data } = await AnnotationFactory.create(
        xref,
        buttonWidgetRef,
        pdfManagerMock,
        idFactoryMock
      
      expect(data.annotationType).toEqual(AnnotationType.WIDGET
      expect(data.checkBox).toEqual(true
      expect(data.fieldValue).toEqual("1"