Update rap2hpoutre/fast-excel to use 4.0

[schonhoff]

Hello,

after a composer update I saw an abandoned notification for box/spout. After some research I saw that the package was used by rap2hpoutre/fast-excel which is used in this package. They upgraded to version 4.0 to remove the dependency. Maybe the package can be upgraded to use rap2hpoutre/fast-excel 4.0 . It seems a stable version for the package.

But you can wait for the following merge:
rap2hpoutre/fast-excel#282
This is a maintainer from Laravel/Nova which has the same problem.
@see laravel/nova-issues#4569

[yajra]

Thanks for reporting, I am aware of the issue and have already migrated one of my repo to openspout https://github.com/yajra/laravel-datatables-export.

I might remove fast-excel and redo the export here using openspout. Currently using the new export package but will try to migrate this repo too.