Merge pull request #287 from kattni/sht4x

Adding SHT4x

Author: ladyada

.gitmodules

@@ -769,3 +769,6 @@
 [submodule "libraries/helpers/oauth_2"]
 	path = libraries/helpers/oauth_2
 	url = https://github.com/adafruit/Adafruit_CircuitPython_OAuth2.git
+[submodule "libraries/drivers/sht4x"]
+	path = libraries/drivers/sht4x
+	url = https://github.com/adafruit/Adafruit_CircuitPython_SHT4x.git

docs/drivers.rst

@@ -366,6 +366,7 @@ equivalent carbon dioxide (``eco2`` / ``eCO2``), and total volatile organic comp
     SCD30 eCO2, Temperature, and Humidity Sensor <https://circuitpython.readthedocs.io/projects/scd30/en/latest/>
     SGP30 Air Quality <https://circuitpython.readthedocs.io/projects/sgp30/en/latest/>
     SHT31-D Temperature and Humidity <https://circuitpython.readthedocs.io/projects/sht31d/en/latest/>
+    SHT4x Temperature and Humidity <https://circuitpython.readthedocs.io/projects/sht4x/en/latest/>
     SHTC3 Temperature and Humidity <https://circuitpython.readthedocs.io/projects/shtc3/en/latest/>
     Si7021 Temperature and Humidity <https://circuitpython.readthedocs.io/projects/si7021/en/latest/>
     TC74 Digital Temperature Sensor <https://circuitpython.readthedocs.io/projects/tc74/en/latest/>