build(deps): bump onelogin/php-saml from 4.1.0 to 4.2.0 in /3rdparty

Bumps [onelogin/php-saml](https://github.com/onelogin/php-saml) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/onelogin/php-saml/releases)
- [Changelog](https://github.com/SAML-Toolkits/php-saml/blob/4.2.0/CHANGELOG)
- [Commits](SAML-Toolkits/php-saml@4.1.0...4.2.0)

---
updated-dependencies:
- dependency-name: onelogin/php-saml
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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