message: fix(svg): update `_svgDom` when vnode changed.
diff: @@ -108,6 +108,7 @@ class SVGPainter implements PainterBase {
  vnode.attrs.style = 'user-select:none;position:absolute;left:0;top:0;';
  patch(this._oldVNode || this._svgDom, vnode);
  this._oldVNode = vnode;
  + this._svgDom = vnode.elm as SVGElement;
  }
  }
  