message: Fixed XCode warnings
  Fixed XCode warning: "declaration of "Struct MavsdkServer" will not be visible outside of this function"
diff: @@ -16,6 +16,7 @@ extern "C" {
  #define DLLExport __attribute__((visibility("default")))
  #endif
  + struct MavsdkServer;
  DLLExport void mavsdk_server_init(struct MavsdkServer** mavsdk_server);
  DLLExport int mavsdk_server_run(
  