Columns Attr in Worksheet not being Updated anywhere

[AhmedKamal20]

https://github.com/zdavatz/spreadsheet/blob/1d746dd225440260756545761d400b21e890a223/lib/spreadsheet/worksheet.rb#L55

I don't see any code that update the columns array, like for example the update for the rows array here: https://github.com/zdavatz/spreadsheet/blob/1d746dd225440260756545761d400b21e890a223/lib/spreadsheet/worksheet.rb#L231

that result that when i call columns on a sheet filled with columns, it return an empty array.

[zdavatz]

Let me know if you find a solution or come up with a patch.