Icon request: Non-binary gender symbols
Hi team, 

Could you please add some non-binary gender symbols.
![Non-binary_symbols](https://user-images.githubusercontent.com/46315711/127717870-1158abbc-9124-4772-bd7f-c30631210e79.jpg)

I specifically need to neutrois symbol but I think people might appreciate some of the other symbols as well. 

Thanks for the great project!
