AutoSizeColumn should support full-width characters

[Flithor]

I've checked the code https://github.com/dotnetcore/NPOI/blob/947220dedb1fc506e764568159a95498295250cf/src/NPOI/SS/Util/SheetUtil.cs#L442 Looks you are just use the fixed width of the single half-width character with the content length to calating the cell width. But it's not fit for the full-width characters.