Update CMakeLists.txt CMake version.

[Oglo12]

The version of CMake that CMakeLists.txt requests is deprecated, and some of my friends are unable to compile my program because of that.

[sergiodj]

Here's more information about the problem:

2025/06/24 18:57:44 WARN CMake Error at CMakeLists.txt:2 (cmake_minimum_required):
2025/06/24 18:57:44 WARN   Compatibility with CMake < 3.5 has been removed from CMake.
2025/06/24 18:57:44 WARN
2025/06/24 18:57:44 WARN   Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
2025/06/24 18:57:44 WARN   to tell CMake that the project requires at least <min> but has been updated
2025/06/24 18:57:44 WARN   to work with policies introduced by <max> or earlier.
2025/06/24 18:57:44 WARN
2025/06/24 18:57:44 WARN   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.

The failure happens in CMake 4.0.

This is also mentioned in CMake's 4.0 release notes.

[michelepagot]

+1