Return percentile percentage value

[jirikrepl]

Hi @d4rkr00t,

I like your code very much.
I would like to calculate a percentile "percentage value" like in this video:
https://youtu.be/Snf6Wpn-L4c?t=55

Do sth. like this (your modified example from Readme.md):
(obviously the function arguments would need to be changed somehow)

const percentile = require("percentile");
console.log(percentile(8, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])); // 80

[d4rkr00t]

Hi! Interesting idea, I'll think about it. Not sure yet how to better fit it in this package.