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
```
fnArray: [],
        argsArray: [],
        lastChunk: false,
      };
      if (this._stats) {
        this._stats.time("Page Request");
      }
      this._pumpOperatorList({
        pageIndex: this._pageIndex,
        intent: renderingIntent,
        renderInteractiveForms: renderInteractiveForms === true,
        annotationStorage,
      });
    }
    const complete = error => {
      intentState.renderTasks.delete(internalRenderTask);
      
      
      if (this.cleanupAfterRender || renderingIntent === "print") {
        this.pendingCleanup = true;
      }
      this._tryCleanup();
      if (error) {
        internalRenderTask.capability.reject(error);
        this._abortOperatorList({
          intentState,
          reason: error,
        });
      } else {
        internalRenderTask.capability.resolve();