Warning, my KP115 switches that have been force-upgraded to firmware 1.1.0 no longer work.

`# uv run kasa --username [redacted] --password [redacted] --host 192.168.56.172
Discovering device 192.168.56.172 for 10 seconds
== Authentication failed for device ==
== Discovery Result ==
Device Type: IOT.SMARTPLUGSWITCH
Device Model: KP115(US)
IP: 192.168.56.172
MAC: 20-23-51-[redacted]
Device Id (hash): [redacted]
Owner (hash): [redacted]
HW Ver: 1.0
OBD Src: tplink
Encrypt Type: KLAP
HTTP Port: 80
Login version: 2

Raised error: Device response did not match our challenge on ip 192.168.56.172, check that your e-mail and password (both case-sensitive) are correct.
Run with --debug enabled to see stacktrace
ERROR Unclosed client session base_events.py:1871
client_session: <aiohttp.client.ClientSession object at 0x78976ac3ad50>
ERROR Unclosed connector base_events.py:1871
connections: ['deque([(<aiohttp.client_proto.ResponseHandler object at 0x78976b089af0>, 4411457.606844612)])']
connector: <aiohttp.connector.TCPConnector object at 0x78976ac3ae90>
`

Switches running 1.0.20 work fine, but anything with 1.1.0 fails authentication. I suspect this is not limited to the KP115, but that's as far as I've been able to test.