Fix style

Author: leomarquine

src/Loaders/Insert.php

@@ -178,8 +178,8 @@ protected function insert($row)
             $result = [];
 
             foreach ($this->columns as $key => $column) {
-		isset($row[$key]) ? $result[$column] = $row[$key] : $result[$column] = NULL;            
-	    }
+                isset($row[$key]) ? $result[$column] = $row[$key] : $result[$column] = null;
+            }
 
             $row = $result;
         }

src/Loaders/InsertUpdate.php

@@ -235,7 +235,7 @@ protected function execute($row)
             $result = [];
 
             foreach ($this->columns as $key => $column) {
-                isset($row[$key]) ? $result[$column] = $row[$key] : $result[$column] = NULL;
+                isset($row[$key]) ? $result[$column] = $row[$key] : $result[$column] = null;
             }
 
             $row = $result;