model: change health data type to int8

Author: y21

models/player/player.go

@@ -42,7 +42,7 @@ type Player struct {
 DirectionChangedAt int64 `json:"directionChangedAt"`
 Guest bool `json:"guest"`
 Distance int `json:"distance"`
-Health uint8 `json:"health"`
+Health int8  `json:"health"`
 AntiCheatFlags int `json:"antiCheatFlags"`
 X int `json:"x"`
 Y int `json:"y"`