exportSVG on workplane with Sketch

Can sketches be exported to SVGs? I'm running this program:

```
import cadquery as cq

result = cq.Workplane("front").sketch().circle(1).parent
result.exportSvg('test.svg')
```

This is the error I get:

```Traceback (most recent call last):
File "/Users/mntruell/test_cq.py", line 5, in
result.exportSvg('test.svg')
File "/usr/local/Caskroom/miniforge/base/envs/myenv/lib/python3.10/site-packages/cadquery/cq.py", line 1079, in exportSvg
exportSVG(self, fileName)
File "/usr/local/Caskroom/miniforge/base/envs/myenv/lib/python3.10/site-packages/cadquery/occ_impl/exporters/svg.py", line 290, in exportSVG
svg = getSVG(shape.val(), opts)
File "/usr/local/Caskroom/miniforge/base/envs/myenv/lib/python3.10/site-packages/cadquery/occ_impl/exporters/svg.py", line 167, in getSVG
uom = guessUnitOfMeasure(shape)
File "/usr/local/Caskroom/miniforge/base/envs/myenv/lib/python3.10/site-packages/cadquery/occ_impl/exporters/svg.py", line 66, in guessUnitOfMeasure
bb = BoundBox._fromTopoDS(shape.wrapped)
AttributeError: 'Sketch' object has no attribute 'wrapped'
```