Changed required modules

* Bumped simplesamlphp-module-perun
* Added simplesamlphp

composer.json

@@ -17,6 +17,7 @@
     ],
     "require": {
         "simplesamlphp/composer-module-installer": "~1.0",
-        "cesnet/simplesamlphp-module-perun": "~2.0"
+        "simplesamlphp/simplesamlphp": "~1.17",
+        "cesnet/simplesamlphp-module-perun": "~3.0"
     }
 }