Missing sleep mode to improve power consumption

[bonjour81]

Hi!
I found a "sleep" function for VEML6075 in my code but cannot remember how I get this.
Currently, I do not see any sleep function in the library.

Could we add this ? (I'm too noob to dare pull some request or whatever, I have no idea how to do it)

I found a piece of code in this forum:
https://forum.mysensors.org/topic/6952/veml6070-and-veml6075-uv-sensors/25

in the .h:
void sleep(bool mode);

in the .cpp:
`void VEML6075::sleep(bool mode) {

if (mode) 
	this->config |= 1; // Go to sleep			
else 
	this->config &= 254; // Wake up

this->write16(VEML6075_REG_CONF, this->config);

}`

I cannot test today, but the code seems fine to me as the datasheet state that bit 0 of command register 00 as "SD" bit (ShutDown):
enable = 0 , Shutdown = 1

If possible, I would suggest to replace value with hex: 0xFE is more clear than 254 in such situation (imho)