v1.2.1

Changes - internal refactoring/code clean-up

• HACS Hassfest validator added
• A delivery for NotifyEntity is now auto-generated for an empty platform config
  • If any deliveries are configured, then NotifyEntity must be included if needed, since won't be auto-generated
• The old unused 'default delivery by transport' removed
• transport.transport is now transport.name
• Simplified notification logic by passing new Delivery object and avoiding re-lookups
• Removed default for Delivery which had been replaced long ago by selection enum
• Removed DEFAULT scenario and replaced by Implicit Deliveries managed by DeliveryRegistry
• Added new enquire_implicit_deliveries Action
• Added more tests for hass_api

Full Changelog: v1.2.0...v1.2.1