Add SetColStyle for stream writer

[inX-Su]

Description
SetColStyle not working

Steps to reproduce the issue:

func test() {
	file := excelize.NewFile()
	writer, _ := file.NewStreamWriter("sheet1")
	row := make([]interface{}, 0)
	row = append(row, 100)
	writer.SetRow("A1", row)
	// $ format
	dollarStyle, _ := file.NewStyle(&excelize.Style{
		NumFmt: 177,
	})
	file.SetColStyle("sheet1", "A", dollarStyle)

	file.SaveAs("a.xlsx")
}

[xuri]

Thanks for your issue. The SetColStyle function is not a streaming API, so it won't work in stream mode, we need to implement it for stream writer, and contribution are welcome.

[inX-Su]

I find the SetColWidth function supported for streaming API, however, it also doesn't work.

func main() {
	file := excelize.NewFile()

	writer, _ := file.NewStreamWriter("Sheet1")
	row := make([]interface{}, 0)
	row = append(row, 101)
	row = append(row, 123)
	writer.SetRow("A1", row)

	writer.SetColWidth(2, 3, 20)

	file.SaveAs("a.xlsx")
}

[xuri]

As the documentation notice: "you must call the SetColWidth function before the SetRow function." This was duplicate with issue #1294, I closed this merged into #1294.