Homebridge 1.3.1 : This plugin slows down Homebridge
**Describe the bug**
[04/03/2021, 11:00:57] [homebridge-pihole] This plugin slows down Homebridge. The read handler for the characteristic 'On' didn't respond at all!. Please check that you properly call the callback! See https://git.io/JtMGR for more info.

**To Reproduce**
restarting Homebridge brings up this error

**Expected behavior**
no warning

**Desktop (please complete the following information):**
not relevant

**Additional context**
Add any other context about the problem here.
