Fine tuning return type for getLastCalledUrl() method

Author: roberto-butti

src/StoryblokResponse.php

@@ -89,9 +89,14 @@ public function getResponseStatusCode(): int
         return $this->response->getStatusCode();
     }
 
-    public function getLastCalledUrl(): mixed
+    public function getLastCalledUrl(): string
     {
-        return $this->response->getInfo('url');
+        if (is_scalar($this->response->getInfo('url'))) {
+            return strval($this->response->getInfo('url'));
+        }
+
+        return "";
+
     }
 
     public function isOk(): bool

src/StoryblokResponseInterface.php

@@ -36,7 +36,7 @@ public function toArray(): array;
 
     public function data(): StoryblokDataInterface;
 
-    public function getLastCalledUrl(): mixed;
+    public function getLastCalledUrl(): string;
 
     public function isOk(): bool;