Add Battery and Version to device status mapping

[slimninja]

Ref new api statuses: OpenWonderLabs/SwitchBotAPI#11

[slimninja]

Or, adding all fields for sake of completeness: https://github.com/OpenWonderLabs/SwitchBotAPI#bot-1

    "deviceId": "deviceId",
    "deviceType": "deviceType",
    "power": "power",
    "battery": "battery",
    "version": "version",
    "deviceMode": "deviceMode",
    "hubDeviceId": "hubDeviceId",

[jonghwanhyeon]

Thanks for your contribution. Because this issue will happen again in the future, I just removed status_key_mapping in version 2.3.0.