add "Wong et al" color scheme

[jgunstone]

hi - love palettable for its simplicity, making it easy to use consistent colors across many tools without heavy (often un-wanted) dependencies (i.e. matplotlib).

I use the Bang Wong color scheme and it would be great to retrieve it from palettable

described here:
https://davidmathlogic.com/colorblind/#%23000000-%23E69F00-%2356B4E9-%23009E73-%23F0E442-%230072B2-%23D55E00-%23CC79A7

could this be added?
happy to try and make PR if you want to suggest an approach?

[jiffyclub]

Hi, thanks for your interest! #55 (specifically the parts pertaining to plotly) would be a good pattern to follow if you'd like to make your own PR.

[jgunstone]

thanks for the tip - and great that you'd be happy to add it -
I'm pretty busy right now but will try and take a look in the next couple of weeks