Fixed critical bug where PDOEngine could not properly dissolve at the end of execution.

src/FuzeWorks/DatabaseEngine/PDOEngine.php

@@ -163,9 +163,6 @@ class PDOEngine extends DatabaseDriver
     {
         // Commit or rollback all changes to the database
         $this->transactionEnd();
-
-        // And close the connection
-        $this->pdoConnection = null;
         return true;
     }