Shelly H&T Humidity error
humidity is not displayed correctly. The Shelly app correctly shows e.g. 61%. The Homebridge only gives the error: 

[29/06/2021, 19:45:07] [homebridge-shelly] This plugin generated a warning from the characteristic 'Current Relative Humidity': characteristic was supplied illegal value: number 122 exceeded maximum of 100. See https://git.io/JtMGR for more info.

The value is always twice as high as the correct value in percent.
So that the Home app always shows 100%.

**Environment:**
 - Shelly device(s): Shelly H&T
 - Plugin version: v0.18.0
 - Device running homebridge: Raspberry Pi
