ajout retour en collection, modification des tests en conséquences

src/QueryBuilder.php

@@ -124,7 +124,7 @@ class QueryBuilder
         $this->columns = ["*"];
         $data = $this->getData();
         if (count($data) > 0) {
-            return $this->prepareModels($data)[0];
+            return $this->prepareModels($data)->first();
         }
         return null;
     }
@@ -172,7 +172,7 @@ class QueryBuilder
             $model = new Model();
             $ret[] = $model->setPk($this->pk)->setTable($this->table)->fillData($row);
         }
-        return $ret;
+        return new Collection($ret); 
     }
 
     private function getData(): mixed