Fetch permissies: update return type

Author: vixducis

src/ToolboxClient/Directories/Gebruikersbeheer/GetPermissies/GetPermissiesCall.php

@@ -25,7 +25,11 @@ protected function getEndpoint(): string
         return "v1/gebruikersbeheer/permissie";
     }
 
-    public function send(): mixed {
+    /**
+     * @return Permissie[]
+     */
+    public function send(): array
+    {
         return ResponseProcessor::mapArray(
             $this->performRequest(),
             Permissie::class