Add statistics, WN34

Convert sensor to new type, adding statistics to all sensors.
Add WN34 sensors and batteries
Pull in code from PoppyPop fork to remove unused sensors when switching imperial/metric
Tested on core 2021.10.02

0.6

Fix some voltage sensors, and manifest.json. Tested working on HA 2021.10.2. Minor release just to make it work again.

Convert to config_flow

Version 0.5 converts this to a config flow from the previous yaml config method.
Once you restart hass, it will attempt to read your old config from yaml, and
port it over to the config flow.
Verify that it did so correctly, and double check the options match what you
expect for the units under "Options".

Additionally in 0.5, the battery sensors have been significantly changed.
Previously all batteries were simple floats with the raw value displayed.
There are 3 types of batteries that the ecowitt displays data for:

• Simple good/bad batteries. These are now binary sensors. This will leave
  A dead entry in your entities for the old battery sensor. You may safely
  delete that entity.
• Voltage readings. A few batteries display a voltage (soil, WH80).
  A soil battery is normally 1.5v, so a good alarm might be around 1.3?
  WH80 batteries seem to be about 2.38 - 2.4, so maybe in the 2.3 to 2.2 range
  for an alarm?
• Other batteries will now show as a percentage.
  The raw sensor gives a number from 0-5, this is simply multiplied by 20
  to give a percentage of 0-100.

If you were monitoring one of these, be sure to update any automations.

There was a bug in the wind gust sensors, where it was not being affected by
the windunit setting, once you load 0.5, you may find a dead entity for your
wind gust sensors that were setup for the wrong unit.
You may delete these.

Once your configuration has been moved, you should delete the old ecowitt
section from your configuration.yaml file and restart hass.

Major changes:

• Adds a config flow.
• Adds leak detection sensors as binary sensors (they work now).
• Rewrite battery handling completely.
• Fix various bugs having to do with the wind gust sensors and imperial/metric
• Make the wind direction a compass icon.
• Better documentation in readme

windspeed_avg10m bugfix

Fixes a bug with windspeed_avg10m. If you have this sensor and the component isn't working for you, update to this version.

New Sensors, better sensor handling

• Add a few battery sensors
• Add the lightning sensor
• Add the Leak sensor (untested)
• If a sensor is not in the initial probe, the component will now dynamically add it when it appears.
• Tested on HA 0.117.5 (requires 0.115 or later)

Leak sensors, lightning, more batteries

• Add Leak sensors
• Add more batteries
• Add lightning sensors.

This is a testing release. If this breaks you, roll back to 0.3.1. This release requires HA 115 or later.

Testing HACS 117

Merge pull request #24 from GSzabados/patch-1

Update for HA version 115 and fixing typos and adding WH25BATT and WH80BATT

Add a bunch of sensors

Update to include fixes for a bunch of missing sensors (mostly batteries) and a few other bugfixes/etc.

0.2

Fix hacs.json

Initial Release

Initial release.