New Devices

• Arlec PB88UHA Series 2 powerboard (PR #243)

Improvements to existing devices

• Bresser Weather Station: Heat index is not always returned, so is now marked optional (PR #245)

General changes

• underlying tinytuya library updated from 1.6.5 to 1.7.1
  • unlike 1.6.6, this update seems to improve stability, not degrade it.
• support for protocol versions 3.2 and 3.4 based on tinytuya 1.7.x upstream support