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

https://github.com/tornaria/void-packages matplotlib
https://github.com/void-linux/void-packages/pull/46109

python3-matplotlib: update to 3.8.0, also update deps
- python3-matplotlib: update to 3.8.0. (@ahesford)
- python3-kiwisolver: update to 1.4.5, adopt.
- python3-contourpy: update to 1.1.1. (@misuchiru03) 

#### Testing the changes
- I tested the changes in this PR: **briefly**

The update to matplotlib affects sagemath in a mild way (see https://github.com/sagemath/sage/pull/36279 which contains a fix).

I have not yet tested the updates to contourpy and kiwisolver with sagemath, will do.

I'm not sure it's necessary to patch sagemath now as the issue is very minor.

Btw, I'm thinking of packaging https://matplotlib.org/ipympl/ since it seems it will be a standard dependency of sagemath soon (https://github.com/sagemath/sage/pull/36129#issuecomment-1696062778)

Edit: in #46003 I added a patch to sagemath, to support matplotlib 3.8.0, so we don't need to rebuild sagemath twice.

<!--
#### New package
- This new package conforms to the [package requirements](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#package-requirements): **YES**|**NO**
-->

<!-- Note: If the build is likely to take more than 2 hours, please add ci skip tag as described in
https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#continuous-integration
and test at least one native build and, if supported, at least one cross build.
Ignore this section if this PR is not skipping CI.
-->
<!--
#### Local build testing
- I built this PR locally for my native architecture, (ARCH-LIBC)
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - aarch64-musl
  - armv7l
  - armv6l-musl
-->


A patch file from https://github.com/void-linux/void-packages/pull/46109.patch is attached