Migrating from version 20 to 21

CsvConfiguration

Property char? NewLine changed to string NewLine.

// v20
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
	NewLine = '\r',
};

// v21
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
	NewLine = "\r",
};