Asusrouter

Fixes
- Python 3.9 annotations fix

Features
- Python 3.9 support for complete [ha-asusrouter](https://github.com/Vaskivskyi/ha-asusrouter) experience

Features
- Connected devices monitor
- Get port status for WAN / LAN
- USB WAN report to the list of networks labels even when not connected, but supported
- Handle reboots of the device
- Error handling

Fixes
- +- 1 second on boot time
- Reconnect on connection drop

Bug Fixes
- Handle any error on sending a request

Bug Fixes
- Fix negative speed on traffic overflow (each 0xFFFFFFFF + 1 bytes)
- Handle not-authorised error

Changes

:bug: Fixes

* Fix Connected devices sensor from showing offline devices (43) Vaskivskyi
* Fix timezone shift in device_tracker "Connection time" attribute (41) Vaskivskyi
* [Multiple device support] Fix router unique_id assignment (39) Vaskivskyi

:package: Dependencies

* Bump version to 0.2.4 (44) Vaskivskyi