esphome-miot

use cv.require_esphome_version()

docs: add Smartmi Evaporative Humidifier 3 (zhimi.humidifier.ca6) as unsupported

docs: add Xiaomi Smart Graphene Heater (xiaomi.heater.ma8) as unsupported

number: use value_accuracy_to_buf()

add example `zhimi.airp.meb1` config