Merge pull request #8 from newmatter/1.1.3-php8-fix

Fix return type to prevent deprecation warnings in PHP 8+

Author: hkvcc

lib/Model/ComplyCubeCollection.php

@@ -49,7 +49,7 @@ public function load(stdClass $response): void
         $this->rewind();
     }
 
-    public function jsonSerialize()
+    public function jsonSerialize(): mixed
     {
         return array_filter(
             parent::jsonSerialize(),
@@ -63,12 +63,12 @@ public function rewind(): void
         $this->position = 0;
     }
 
-    public function current()
+    public function current(): mixed
     {
         return $this->items[$this->position];
     }
 
-    public function key()
+    public function key(): mixed
     {
         return $this->position;
     }

lib/Model/Model.php

@@ -69,7 +69,7 @@ public function load(stdClass $response): void
         }
     }
 
-    public function jsonSerialize()
+    public function jsonSerialize(): mixed
     {
         return array_filter(
             array_map(function ($value) {