Added copyWith(), == and hashCode overwrites for model classes

lib/data/models/score_entry.dart

@@ -10,6 +10,26 @@ class ScoreEntry {
     return 'ScoreEntry{roundNumber: $roundNumber, score: $score, change: $change}';
   }
 
+  ScoreEntry copyWith({int? roundNumber, int? score, int? change}) {
+    return ScoreEntry(
+      roundNumber: roundNumber ?? this.roundNumber,
+      score: score ?? this.score,
+      change: change ?? this.change,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is ScoreEntry &&
+          runtimeType == other.runtimeType &&
+          roundNumber == other.roundNumber &&
+          score == other.score &&
+          change == other.change;
+
+  @override
+  int get hashCode => Object.hash(roundNumber, score, change);
+
   ScoreEntry.fromJson(Map<String, dynamic> json)
     : roundNumber = json['roundNumber'],
       score = json['score'],