- Work done on insert() and update() function from QueryBuilder.

- Fixed save() and saveAll() from repository
- QueryBuilder can now be flushed after queries.

src/ConnectionAdapter.php

@@ -14,7 +14,7 @@ class ConnectionAdapter
 
     protected AdapterInterface $adapter;
 
-    public PdoObject $pdo;
+    protected PdoObject $pdo;
 
     public function __construct(string $name = "default", array $configuration = [], bool $default = false)
     {
@@ -54,6 +54,11 @@ class ConnectionAdapter
     {
         return $this->adapter;
     }
+    
+    public function pdo() : PdoObject
+    {
+        return $this->pdo ?? $this->pdo = $this->connect()->pdo;
+    }
 
     /**
      * Instanciate an adapter which interact with the data source