Small changes & documentation

lib/data/round.dart

@@ -3,17 +3,17 @@
 /// [roundNum] is the number of the round its reppresenting.
 /// [scores] is a list of the actual scores the players got.
 /// [scoreUpdates] is a list of how the players scores updated this round.
-/// [kamikaze] is the index of the player who got kamikaze. If no one got
+/// [kamikazePlayerIndex] is the index of the player who got kamikaze. If no one got
 /// kamikaze, this value is null.
 class Round {
   final int roundNum;
-  List<int> scores;
-  List<int> scoreUpdates;
-  int? kamikaze;
+  final List<int> scores;
+  final List<int> scoreUpdates;
+  final int? kamikazePlayerIndex;
 
   Round(
       {required this.roundNum,
       required this.scores,
       required this.scoreUpdates,
-      this.kamikaze});
+      this.kamikazePlayerIndex});
 }