composer: bump vgrem/php-spo from 3.1.2 to 3.2.0

Bumps [vgrem/php-spo](https://github.com/vgrem/phpSPO) from 3.1.2 to 3.2.0.
- [Release notes](https://github.com/vgrem/phpSPO/releases)
- [Changelog](https://github.com/vgrem/phpSPO/blob/master/CHANGELOG.md)
- [Commits](vgrem/phpSPO@v3.1.2...v3.2.0)

---
updated-dependencies:
- dependency-name: vgrem/php-spo
  dependency-version: 3.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]