made rows and columns properties public

Qwirkle/QwirkleClassLibrary/Board.cs

@@ -13,8 +13,8 @@ namespace QwirkleClassLibrary
         public ReadOnlyCollection<Cell> ReadCells => cells.AsReadOnly();
         private readonly List<Cell> cells = new();
         
-        private int Rows { get; }
-        private int Columns { get; }
+        public int Rows { get; }
+        public int Columns { get; }
 
         public Board(int rows, int cols)
         {