sdl2-compat: set cmake maximum policy to 3.5.

SDL Commits
1 
From 758a5ab7b54c56643ac3c4f801cf2df99a456ddc Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 26 Jul 2023 20:50:50 +0300
Subject: [PATCH] set cmake maximum policy to 3.5.

hand-picked from SDL2 commit https://github.com/libsdl-org/SDL/commit/14f4fd3f11b4bc5bded6960c7c6118ea06ad86ac
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c727026..5fa4387 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 #        you can define SDL3_INCLUDE_DIRS on the cmdline.  For example:
 #        cmake -DSDL3_INCLUDE_DIRS=/opt/SDL3/include [other stuff ....]
 
-cmake_minimum_required(VERSION 3.0.0)
+cmake_minimum_required(VERSION 3.0.0...3.5)
 project(sdl2_compat VERSION 2.90.0 LANGUAGES C)
 
 if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)