build(deps): bump the composer group across 1 directory with 2 updates

Bumps the composer group with 2 updates in the / directory: [phpoffice/phpspreadsheet](https://github.com/PHPOffice/PhpSpreadsheet) and [phpseclib/phpseclib](https://github.com/phpseclib/phpseclib).


Updates `phpoffice/phpspreadsheet` from 5.0.0 to 5.7.0
- [Release notes](https://github.com/PHPOffice/PhpSpreadsheet/releases)
- [Changelog](https://github.com/PHPOffice/PhpSpreadsheet/blob/master/CHANGELOG.md)
- [Commits](PHPOffice/PhpSpreadsheet@5.0.0...5.7.0)

Updates `phpseclib/phpseclib` from 3.0.50 to 3.0.51
- [Release notes](https://github.com/phpseclib/phpseclib/releases)
- [Changelog](https://github.com/phpseclib/phpseclib/blob/master/CHANGELOG.md)
- [Commits](phpseclib/phpseclib@3.0.50...3.0.51)

---
updated-dependencies:
- dependency-name: phpoffice/phpspreadsheet
  dependency-version: 5.7.0
  dependency-type: direct:production
  dependency-group: composer
- dependency-name: phpseclib/phpseclib
  dependency-version: 3.0.51
  dependency-type: direct:production
  dependency-group: composer
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]