CMake: Raised required version to 3.5

[heirecka]

CMake >= 4.0.0-rc1 removed compatibility with versions < 3.5 and errors out with such versions passed to cmake_minimum_required(). 3.5.0 has been released 9 years ago, so I'd assume it's available almost everywhere.

[floitsch]

LGTM.

[floitsch]

Thanks!

[LecrisUT]

Please consider future-proofing this a bit by adding higher-bound to the CMake policies. The higher bound does not indicate the maximum CMake version allowed to use, instead it is the maximum version that we can bump the the lower-bound to without any degradation. I highly encourage to add 3 CMake builders (lowest policy, highest policy, latest-rc)

[floitsch]

Please consider future-proofing this a bit by adding higher-bound to the CMake policies. The higher bound does not indicate the maximum CMake version allowed to use, instead it is the maximum version that we can bump the the lower-bound to without any degradation. I highly encourage to add 3 CMake builders (lowest policy, highest policy, latest-rc)

done.

[LecrisUT]

Thank you, much appreciated ❤️