build: add upper bound to cmake_minimum_required version (#244)

Author: kanru

.gitignore

@@ -30,3 +30,4 @@ chewing-editor.dSYM/
 chewing-editor.app/
 
 Testing/
+/build/

CMakeLists.txt

@@ -19,7 +19,7 @@
 set(CMAKE_USER_MAKE_RULES_OVERRIDE	${CMAKE_CURRENT_SOURCE_DIR}/cmake/c_flag_overrides.cmake)
 set(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX	${CMAKE_CURRENT_SOURCE_DIR}/cmake/cxx_flag_overrides.cmake)
 
-cmake_minimum_required(VERSION 3.0.0)
+cmake_minimum_required(VERSION 3.0.0...3.31.6)
 project(chewing-editor VERSION 0.1.1)
 
 cmake_policy(SET CMP0020 NEW)