public static function setConfig($key, $value = null)
    {
        config()->set(self::KEY.'.'.$key, $value);
    }
public static function setConfig($key, $value = null)
    {
        config()->set(self::KEY.'.'.$key, $value);
    }
public static function setConfig ( $ key , $ value = null ) { config ( ) -> set ( self :: KEY . '.' . $ key , $ value ) ; }
Set the seo config.

@param  string      $key
@param  mixed|null  $value
Set the seo config .