FIX cell formulas not working for writing Workbook

[Ahmed--Mohsen]

There is an issue when trying to write cell with f attribute (formula) that the cell got ignored and not written in the output file as expected

[pietersv]

@Ahmed--Mohsen Thanks for reporting. For diagnostic, do you know if it works correctly with the original SheetJS/js-xlsx?

[Ahmed--Mohsen]

@pietersv No its not working on SheetJS/js-xlsx

• This was an old issue that was reported on the main repo: Formulae not retained on export SheetJS/sheetjs#152
• This fix is heavily inspired by this commit: mcsf@d439645
• My usage depends heavily on your excellent work for styling so I need to fix it here first to be able to use bower with it

[pietersv]

@Ahmed--Mohsen Aha, that's likely a deeper issue with the main branch outside the scope of styling. Can accept a pull request to this branch if you figure this out.

Alternately, if this is for a professional project and you just need it done in the next couple days, can do this under a statement of work. I estimate this at four to six hours. Results would be included in the this public project with unit tests, accessible via bower and npm. Contact me directly if useful.

[evk0]

UP. Issue was fixed in main branch:
SheetJS@5a3774e