"openspout/openspout": "^4.6" so new package like powergrid can be in…

[hemant17]

` Problem 1

• Root composer.json requires rap2hpoutre/fast-excel ^4.1.0 -> satisfiable by rap2hpoutre/fast-excel[v4.1.0].
• power-components/livewire-powergrid[v3.2.0, ..., v3.2.7] require openspout/openspout ^4.6 -> satisfiable by openspout/openspout[v4.6.0, v4.6.1, v4.6.2, 4.x-dev].
• Conclusion: don't install openspout/openspout v4.6.2 (conflict analysis result)
• Root composer.json requires power-components/livewire-powergrid ^3.2 -> satisfiable by power-components/livewire-powergrid[v3.2.0, ..., v3.2.7].`

As Laravel Nova required the Fast-Excel it's not possible for me to remove it