Closed issue by v01dXYZ on void-packages repository

https://github.com/void-linux/void-packages/issues/52892

Description:
The current devel package `ceres-solver-devel` is tied to `eigen 3.3.9` while current `eigen` is `3.4.0`.

This hardcoded version is in the cmake script `CeresConfig.cmake`. Currently, running cmake in projects having ceres as a dependency generates an error about the mismatch with the installed eigen.

<!--
  if you are creating a bug report or package request, please fill out one of the forms here:
  https://github.com/void-linux/void-packages/issues/new/choose

  Don't request an update of a package, We have a script for that:
  https://repo-default.voidlinux.org/void-updates/void-updates.txt
  However, a quality pull request may help.
-->