Bump phpoffice/phpspreadsheet from 1.13.0 to 1.16.0 in /laravel

Bumps [phpoffice/phpspreadsheet](https://github.com/PHPOffice/PhpSpreadsheet) from 1.13.0 to 1.16.0.
- [Release notes](https://github.com/PHPOffice/PhpSpreadsheet/releases)
- [Changelog](https://github.com/PHPOffice/PhpSpreadsheet/blob/master/CHANGELOG.md)
- [Commits](PHPOffice/PhpSpreadsheet@1.13.0...1.16.0)

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Author: dependabot[bot]