Animate between a moon path to a circle

I have this moon SVG that I want to animate to a sun (in a web app). I would use a clip path if it wasn't for the path having a stroke and not being filled.
Now I'm looking for a tool to convert the path to a circle (for the sun), with the same amount of vector points. Is there such a tool somewhere? Or do you have any other recommendations how to solve this?
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