use newer sig keys

[breuerfelix]

https://github.com/instagrambot/instabot/blob/master/instabot/api/config.py

use these constants and replace the one from the instagram private api, they seem to be newer

[pavbro]

How to replace it via config in my index.js?

[breuerfelix]

dont know yet, i have to hook into the library itself... i also need to figure it out :) dont know yet!