Fix deprecated error

Author: corsacca

dt-mapping/migrations/0006-add-grid-to-db.php

@@ -56,7 +56,7 @@ public function up() {
                 $line = fgets( $fp, 2048 );
                 $count++;
 
-                $data = str_getcsv( $line, "\t" );
+                $data = str_getcsv( $line, "\t", '"', '\\' );
 
                 $data_sql = dt_array_to_sql( $data );