Bug report in ressource path

Hello,

There is an error in the path to the file ‘free-shipping.css’ :

https://www.walt-asso.fr/wp-content/plugins/flexible-shipping/assets//dist/css/free-shipping.css

Double slash // before dist

Line 39 of Assets.php :

trailingslashit( $this->assets_url ) . '/dist/css/free-shipping.css',

turn if to :

trailingslashit( $this->assets_url ) . 'dist/css/free-shipping.css',

Thanks !