Error in Yjs plugin when deleting shape
- Error occurred due to try to draw outline but the shape is deleted.
- Need deselect first before deleting shape?

```
@dgmjs_y-webrtc.js?v=3fee8418:3546 Caught error while handling a Yjs update TypeError: Cannot read properties of undefined (reading 'getOutline')
```

```js
this.editor.onRepaint.addListener(() => {
  ...
    const shapeOutlineCCSs = shapes.map((shape) => {
      return shape.getOutline().map((p) => utils_exports.lcs2ccs(canvas, shape, p));  // <--- ERROR
    });
  ...
}
```