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
```
idFactory
        ).then(({ data }) => {
          expect(data.annotationType).toEqual(AnnotationType.LINK
          expect(data.id).toEqual("annot_p0_1"
        }
        const annotation2 = AnnotationFactory.create(
          xref,
          annotationDict,
          pdfManagerMock,
          idFactory
        ).then(({ data }) => {
          expect(data.annotationType).toEqual(AnnotationType.LINK
          expect(data.id).toEqual("annot_p0_2"
        }
        await Promise.all([annotation1, annotation2]
      }
    
    it("should handle missing /Subtype", async function () {
      const annotationDict = new Dict(
      annotationDict.set("Type", Name.get("Annot")
      const annotationRef = Ref.get(1, 0
      const xref = new XRefMock([{ ref: annotationRef, data: annotationDict }]
      const { data } = await AnnotationFactory.create(
        xref,
        annotationRef,
        pdfManagerMock,
        idFactoryMock
      
      expect(data.annotationType).toBeUndefined(
    }