Replace webflo/drupal-core-require-dev and drupal-composer/drupal-scaffold...
requested to merge issue/lightning_media-3380259:3380259-hookfieldwidgetwidgettypeformalter-is-deprecated into 8.x-3.x
Replace webflo/drupal-core-require-dev and drupal-composer/drupal-scaffold with drupal/core-dev and drupal/core-composer-scaffold.
Closes #3380259