添加主动获取奇遇事件，奇遇添加答题逻辑

game-server/app/util/util.ts

@@ -63,6 +63,12 @@ const moment = require('moment');
           result = { id: parseInt(id), value: parseInt(value) };
           break;
         }
+        case 'position': {
+          let [x, y] = arr;
+          if(isNaN(x) || isNaN(y)) throw new Error('格式错误');
+          result = { x: parseInt(x), y: parseInt(y) };
+          break;
+        }
       }
       return result;
     };