Add compatibility for CMake 4

--- CMakeLists.txt.orig	2026-08-27 18:55:50 UTC
+++ CMakeLists.txt
@@ -16,7 +16,7 @@
 #     with this program; if not, write to the Free Software Foundation, Inc.,
 #     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 # */
-cmake_minimum_required(VERSION 2.8.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.5.2 FATAL_ERROR)
 if( NOT CMAKE_VERSION VERSION_LESS 2.8.11)
 	cmake_policy(SET CMP0020 NEW) # qtmain.lib linkage on windows
 endif()