There's a merged pull request on the void-packages repository

openscad: update to 2021.01
https://github.com/void-linux/void-packages/pull/30011

Description:
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#### Have the results of the proposed changes been tested?

- [x] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me

I saw that #29552 is already open, but the CI checks were failing on that PR for some reason (and there were some TODOs related to broken CGAL tests). I'm not sure what's going on there, but this works for me & seems to be a smaller change, so I'm making this PR in the hopes that it might be easier to merge in.

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