git commit -m "cmake: set maximum policy to 3.5

This fixes the following warning when configuring with CMake 3.27+:
```
CMake Deprecation Warning at CMakeLists.txt:3190 (cmake_minimum_required):
Compatibility with CMake < 3.5 will be removed from a future version of
CMake.

Update the VERSION argument <min> value or use a ...<max> suffix to tell
CMake that the project does not need compatibility with older versions.
```

CMakeLists.txt

@@ -2,7 +2,7 @@ if(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
   message(FATAL_ERROR "Prevented in-tree build. Please create a build directory outside of the SDL source code and run \"cmake -S ${CMAKE_SOURCE_DIR} -B .\" from there")
 endif()
 
-cmake_minimum_required(VERSION 3.0.0)
+cmake_minimum_required(VERSION 3.0.0...3.5)
 project(SDL2 C CXX)
 
 if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)