adding the vcnl4040 driver

Author: siddacious

.gitmodules

@@ -478,3 +478,6 @@
 [submodule "libraries/helpers/pyoa"]
 	path = libraries/helpers/pyoa
 	url = https://github.com/adafruit/Adafruit_CircuitPython_PYOA
+[submodule "libraries/drivers/vcnl4040"]
+	path = libraries/drivers/vcnl4040
+	url = https://github.com/adafruit/Adafruit_CircuitPython_VCNL4040.git

docs/drivers.rst

@@ -191,6 +191,7 @@ These sensors detect light related attributes such as ``color``, ``light`` (unit
     TSL2561 Light Sensor <https://circuitpython.readthedocs.io/projects/tsl2561/en/latest/>
     TSL2591 High Dynamic Range Light Sensor <https://circuitpython.readthedocs.io/projects/tsl2591/en/latest/>
     VCNL4010 Proximity and Light <https://circuitpython.readthedocs.io/projects/vcnl4010/en/latest/>
+    VCNL4040 Proximity and Light <https://circuitpython.readthedocs.io/projects/vcnl4040/en/latest/>
     VEML6070 UV Index <https://circuitpython.readthedocs.io/projects/veml6070/en/latest/>
     VEML6075 UV Index <https://circuitpython.readthedocs.io/projects/veml6075/en/latest/>
     VEML7700 High Accuracy Ambient Light Sensor <https://circuitpython.readthedocs.io/projects/veml7700/en/latest/>