Add support FALSE to orderColumn.

Author: redredimano

src/QueryDataTable.php

@@ -671,11 +671,15 @@ protected function hasOrderColumn($column)
      * Apply orderColumn custom query.
      *
      * @param string $column
-     * @param array  $orderable
+     * @param array $orderable
      */
     protected function applyOrderColumn($column, $orderable)
     {
         $sql = $this->columnDef['order'][$column]['sql'];
+        if ($sql === false) {
+            return;
+        }
+
         if (is_callable($sql)) {
             call_user_func($sql, $this->query, $orderable['direction']);
         } else {