uwp: define _WIN32_WINNT to avoid compile issues with asio

CMakeLists.txt

@@ -266,6 +266,7 @@ target_compile_definitions(${PROJECT_NAME} PRIVATE
 		$<$<BOOL:${MSVC}>:NOMINMAX>
 		$<$<BOOL:${TEST_AUTOMATION}>:TEST_AUTOMATION>
 		$<$<BOOL:${WINDOWS_STORE}>:NOCRYPT>
+		$<$<BOOL:${WINDOWS_STORE}>:_WIN32_WINNT=0x0A00>
 		$<$<OR:$<BOOL:${MINGW}>,$<BOOL:${MSVC}>>:_USE_MATH_DEFINES>)
 
 if(UNIX AND NOT ANDROID AND NOT APPLE)