There is an updated pull request by tornaria against master on the void-packages repository

https://github.com/tornaria/void-packages flintlib
https://github.com/void-linux/void-packages/pull/46832

[WIP] flintlib: update to 3.0.0 / track sagemath-10.2 prereleases
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#### Testing the changes
- I tested the changes in this PR: **briefly**

This is a major update. A couple of packages need rebuilding (eclib, singular).

For sagemath, we need a patch (in progress: https://github.com/sagemath/sage/pull/35848).

Since backporting patches is a pain and we are not in a hurry, I'm instead targeting 10.2.beta8. Note this already moves sagemath to cython 3.

The goal is to merge flintlib 3.0 together with sagemath 10.2 when the latter is released.

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A patch file from https://github.com/void-linux/void-packages/pull/46832.patch is attached