Don't static compile on Darwin systems

Joel Grunbaum

2022-01-11 d14f48a147190989d9b58f7b56429ac8711be077

 json.hpp

@@ -29,7 +29,7 @@
   NONE
};

enum TradeTypeEnum { BUY_AGGRESSOR, SELL_AGGRESSOR };
enum TradeTypeEnum { BUY_AGGRESSOR, SELL_AGGRESSOR, BROKER_TRADE };

struct Message {
   MessageTypes type;