Be able to pass a CsvConfiguration object to the ExcelWriter

[benspeth]

Is your feature request related to a problem? Please describe. I want to omit writing a header row when using the ExcelWriter. I can't do that because pass a CsvConfiguration object to the ExcelWriter

Describe the solution you'd like Basically just make the following ctor public :

private ExcelWriter(Stream stream, string sheetName, CsvConfiguration configuration)