mysql 8.4.X后不支持 SHOW MASTER STATUS 命令，需要使用SHOW BINARY LOG STATUS 命令。
Configurator.AdjustStartingPosition 新增一个版本详细方法

private async Task<Dictionary<string, string>> VersionInfo(CancellationToken cancellationToken)
    {
        var command = new QueryCommand("SELECT @@version AS Version, @@version_comment AS Comment");
        await _connection.WritePacketAsync(command.Serialize(), 0, cancellationToken);
        var (packet, _) = await _connection.ReadPacketAsync(cancellationToken);
        Extensions.ThrowIfErrorPacket(packet, "Getting server version error.");
        var resultSet = await ReadResultSet(cancellationToken);
        if (resultSet.Count != 1)
            throw new InvalidOperationException("Could not read server version.");
        var version = resultSet[0].Cells[0];
        var comment = resultSet[0].Cells[1];
        return new Dictionary<string, string>
        {
            { "Version", version },
            { "Comment", comment }
        };
    }

再修改Configurator.AdjustStartingPosition 方法的command 命令获取Binlog文件名称和位置

        QueryCommand command;
        var versionInfo = await VersionInfo(cancellationToken);
        if (versionInfo.TryGetValue("Comment", out var comment)
            && comment.Contains("MySQL")
            && versionInfo.TryGetValue("Version", out var version))
        {
            // 判断 version 小于 8.4.0 时，使用 使用 SHOW MASTER STATUS 命令获取起始位置
            // 否则，使用 SHOW BINARY LOGS & SHOW BINARY LOG STATUS 命令获取起始位置
            var versionNumbers = version.Split('.', StringSplitOptions.RemoveEmptyEntries);
            if (int.Parse(versionNumbers[0]) < 8 ||
                (int.Parse(versionNumbers[0]) == 8 && int.Parse(versionNumbers[1]) < 4))
            {
                command = new QueryCommand("SHOW MASTER STATUS");
            }
            else
            {
                command = new QueryCommand("SHOW BINARY LOG STATUS");
            }
        }
        else
        {
            command = new QueryCommand("SHOW MASTER STATUS");
        }

不支持mysql8.4？ #40

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