Update dependencies

Author: tvdijen

composer.json

@@ -22,8 +22,8 @@
         }
     },
     "require-dev": {
-        "simplesamlphp/simplesamlphp": "^1.17",
-        "simplesamlphp/simplesamlphp-test-framework": "~0.0.11"
+        "simplesamlphp/simplesamlphp": "^1.17.7",
+        "simplesamlphp/simplesamlphp-test-framework": "~0.0.15"
     },
     "support": {
         "issues": "https://github.com/simplesamlphp/simplesamlphp-module-casserver/issues",