Fix iaqualink sensors#36000

Merged

MartinHjelmare merged 2 commits intohome-assistant:devfrom

flz:iaqualink-fixes

May 23, 2020

Commits on May 22, 2020

iaqualink: small sensor fixes
flz
committed

Commits on May 23, 2020

Re-add device_class, fix type hints.
flz
committed