function lazy_update_8305 in Lazy-load 8.3
Set lazySizes library path default.
File
- ./lazy.install, line 205 
- Install, update, and uninstall functions for the Lazy-load module.
Code
function lazy_update_8305() {
  $config = \Drupal::configFactory()
    ->getEditable('lazy.settings');
  $config
    ->set('libraryPath', '/libraries/lazysizes')
    ->save(TRUE);
}