大幅変更＆環境バージョンアップ

lib/model/game_state_instance.dart

@@ -0,0 +1,8 @@
+enum LocationState { noGps, notInCheckin, withinCheckin }
+
+enum GameState { notStarted, startedNotCounted, startedCounted, nodeGoal }
+
+class GameInsStatetance {
+  LocationState locationState = LocationState.noGps;
+  GameState gameState = GameState.notStarted;
+}