Return null if nothing found in case if find()

Author: keesschepers

src/Picqer/Carriers/SendCloud/Query/FindOne.php

@@ -6,7 +6,11 @@ public function find($id)
     {
         $result = $this->connection()->get($this->url . '/' . urlencode($id));
 
+        if (!array_key_exists($this->namespaces['singular'], $result)) {
+            return null;
+        }
+
         return new self($this->connection(), $result[$this->namespaces['singular']]);
     }
 
-}
+}