Update simplesamlphp/simplesamlphp-test-framework requirement (#74)

Updates the requirements on [simplesamlphp/simplesamlphp-test-framework](https://github.com/simplesamlphp/simplesamlphp-test-framework) to permit the latest version.

Updates `simplesamlphp/simplesamlphp-test-framework` to 1.9.2
- [Commits](simplesamlphp/simplesamlphp-test-framework@v1.8.0...v1.9.2)

---
updated-dependencies:
- dependency-name: simplesamlphp/simplesamlphp-test-framework
  dependency-version: 1.9.2
  dependency-type: direct:development
  dependency-group: development-dependencies
...

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Author: dependabot[bot]

composer.json

@@ -29,7 +29,7 @@
         "web-auth/cose-lib": "~4.4.0"
     },
     "require-dev": {
-        "simplesamlphp/simplesamlphp-test-framework": "~1.8.0"
+        "simplesamlphp/simplesamlphp-test-framework": "~1.9.2"
     },
     "config": {
         "allow-plugins": {