w1thermsensor 2.0.0 (2021-01-25)

Features

Refacor Sensor and Unit out of W1ThermSensor class.

The Sensors are available in the Sensor enum:
```
from w1thermsensor import Sensor

print(Sensor.DS18B20)
```
The Units are available in the Unit enum:
```
from w1thermsensor import Unit

print(Unit.DEGREES_F) (#0)
```
Add AsyncW1ThermSensor class to support asyncio interfaces. (#52)
added option to display resolution in cli ls command. (#86)

Deprecations and Removals

Drop Python 2 and Python 3.4 support. (#58)
Replace precision with resolution - in CLI and Python API. (#74)