Issue #2218199 by andypost: Move email and number field types to \Drupal\Core\Field, remove modules.

Issue #2095303 by swentel, plopesc, Berdir, claudiu.cristea, yched: Rename 'field_entity' to 'field_config' and 'field_instance' to 'field_instance_config'.

Issue #2057869 by dawehner, jibran: Provide an alias for 'plugin.manager.entity' called 'entity.manager'.

Issue #1497374 by yched, chx, amateescu, plach, Damien Tournoud, fago, swentel: Switch from Field-based storage to Entity-based storage.

Issue #1847002 by tim.plunkett, effulgentsia, msonnabaum: Move entity type classes from Drupal$provider\Plugin\Core\Entity to Drupal$provider\Entity.

Issue #1981342 by aspilicious, andypost, swentel: Drop procedural usage of fields in [s-u-v] modules.

Issue #1893108 follow-up by Berdir, dawehner: Rename EntityUnitBaseTest => EntityUnitTestBase to conform to coding standards.