update spdlog

third_party/spdlog/cmake/utils.cmake

@@ -29,7 +29,10 @@ function(spdlog_enable_warnings target_name)
     target_compile_options(${target_name} PRIVATE
         $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
             -Wall -Wextra -Wconversion -pedantic -Wfatal-errors>
-        $<$<CXX_COMPILER_ID:MSVC>:/W4 /WX>)
+        $<$<CXX_COMPILER_ID:MSVC>:/W4>)
+		if(MSVC_VERSION GREATER_EQUAL  1910)  #Allow non fatal security wanrnings for msvc 2015 
+			target_compile_options(${target_name} PRIVATE /WX)
+		endif()
 endfunction()