Include Raspberrpy Pi 4
Include Raspberrpy Pi 4

The Raspberry Pi 4 uses the same Broadcom 2835 as the Raspberry Pi 3. 
The module will work on Raspberry Pi 4 without changes, but the comment makes clear why it works.
adafruit/Adafruit_Python_DHT,adafruit/Adafruit_Python_DHT,adafruit/Adafruit_Python_DHT