CMake warns on the current minimum requirement (3.5). Update to 3.10.
This means support is still available for the default on Ubuntu 18.04, which
exited LTS standard in April of 2023.
[draft]
# in the COPYING file in the root directory of this source tree).
# ################################################################
-cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
# As of 2018-12-26 ZSTD has been validated to build with cmake version 3.13.2 new policies.
# Set and use the newest cmake policies that are validated to work