Bump simplesamlphp/saml2 from 4.16.14 to 4.17.0

Bumps [simplesamlphp/saml2](https://github.com/simplesamlphp/saml2) from 4.16.14 to 4.17.0.
- [Release notes](https://github.com/simplesamlphp/saml2/releases)
- [Commits](simplesamlphp/saml2@v4.16.14...v4.17.0)

---
updated-dependencies:
- dependency-name: simplesamlphp/saml2
  dependency-type: direct:production
...

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Author: dependabot[bot]

composer.json

@@ -34,7 +34,7 @@
         "ramsey/uuid": "^3.3.0",
         "sensio/framework-extra-bundle": "^3.0",
         "sensio/generator-bundle": "^3.0",
-        "simplesamlphp/saml2": "4.16.*",
+        "simplesamlphp/saml2": "4.17.*",
         "swiftmailer/swiftmailer": "^5.4",
         "symfony/monolog-bundle": "^3.1.0",
         "symfony/swiftmailer-bundle": "^2.6",