Merge pull request #47 from ILW8/fix-roll

fix roll upper bound off-by-one bug

osu.Game/Online/Chat/StandAloneChatDisplay.cs

@@ -600,7 +600,7 @@ private void newCommandHandler(IEnumerable<Message> messages)
                 }
 
                 var rnd = new Random();
-                long randomNumber = rnd.NextInt64(1, limit);
+                long randomNumber = rnd.NextInt64(1, limit + 1);
                 EnqueueBotMessage($@"{message.Sender} rolls {randomNumber}");
             }
         }