fix: Bump cmake_minimum_required to 3.5

[galmyk]

Last week CMake 4.0 released and it is in available in some bleeding edge distros like Arch Linux and it will be available in other distros soon.

Compatibility with CMake < 3.5 has been removed from CMake 4.0.

So we need to update the VERSION argument <min> value. Or, use the <min>...<max> syntax to tell CMake that the project requires at least <min> but has been updated to work with policies introduced by <max> or earlier.

Or, we need add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to cmake arguments to try configuring anyway.

I changed <min> to 3.5, so we can build with cmake >= 4.0.