#2508662 FieldItemInterface::insert() and FieldItemInterface::update() removed in favor of FieldItemInterface::postSave()

from:
  arity_max: 0
  fqn: '\Drupal\Core\Field\FieldItemInterface::insert'
to:
  arity_max: 1
  arity_min: 1
  fqn: '\Drupal\Core\Field\FieldItemInterface::postSave'
from:
  arity_max: 0
  fqn: '\Drupal\Core\Field\FieldItemInterface::update'
to:
  arity_max: 1
  arity_min: 1
  fqn: '\Drupal\Core\Field\FieldItemInterface::postSave'
from:
  arity_max: 0
  fqn: '\Drupal\Core\Field\FieldItemListInterface::insert'
to:
  arity_max: 1
  arity_min: 1
  fqn: '\Drupal\Core\Field\FieldItemListInterface::postSave'
from:
  arity_max: 0
  fqn: '\Drupal\Core\Field\FieldItemListInterface::update'
to:
  arity_max: 1
  arity_min: 1
  fqn: '\Drupal\Core\Field\FieldItemListInterface::postSave'