20200507.1 - Rewrite for ConfigFlows and DataUpdateCoordinator Pt. I

This is a first release to support Config Flows and the DataUpdateCoordinator.
It consist of a more-or-less full rewrite of core component features.

⚠️ Requires HomeAssistant >= 109.0

⚠️ When a previous version of this component has been installed via HACS, the whole repository has to be deleted and re-added in HACS settings!

This custom component should appear as additional integration next to the default bmw_connected_drive.

What should be working

• Adding an account via Integrations > + (no icon due to changed component domain)
• For each car:
  • Lock state, lock, unlock (via HA lock service)
  • Binary sensors
  • Sensors
• All sensors should update themselves in a 5-minute interval.
• Multiple accounts are supported

What might be working

• Multiple cars per account

Not implemented yet

• Notify
• Any remote or custom services
• Device tracker