* add support for state_class measurements in wiffi integration
* use new STATE_CLASS_TOTAL_INCREASING for metered entities
like
- amount of rainfall per hour/day
- rainfall hours per day
- sunshine hours per day
* Update homeassistant/components/wiffi/sensor.py
Co-authored-by: Greg <greg.diehl.gtd@gmail.com>
Co-authored-by: Greg <greg.diehl.gtd@gmail.com>