Add target charge sensors

Add two new sensors to report on the current charge target and whether or not the tank is charging

Add PV Power sensor

This release adds a new sensor called pv_power, which reports the current power being diverted by the Mixergy PV Diverter kit.

Add support for Holiday mode

This release adds support for holiday mode.

Currently, when the tank is in holiday mode, the integration will break as it expects information which Mixergy does not provide when the tank is in holiday mode.

A new sensor has also been added, mixergy_[id]_holiday_mode which indicates if the tank is in holiday mode.

Drop lowest target to 45 degrees Celcius

0.3.4

Bump version to match github

Fix issue with target temperature sensor

v0.3.3

Fix issue with missing argument

Add a Target Temperature Sensor

v0.3.0

Add info.md file

Remove old DEVICE_CLASS_* definitions

v0.2.0

import SensorDeviceClass and BinarySensorDeviceClass

Add Target Temperature Control

v0.1.1

Correct request parameter name

Add Target Temperature Control

v0.1

Fix service registration

Include new heat pump sensor

This build contains a fix so the new heat pump sensor is correctly registered.