Heroku deploy finally updated to 5.2?

Hi, this thread is 3 months old (so I'm not sure if posting there would be considered necro): How can i install 5.2 on heroku account

Is anyone interested in getting this repo updated to 5.2 with Python 3: http://github.com/collective/training-sandbox

Do we have a to-do list of packages and cfgs?

Is there a way this can be easily automated for future changes (like via bash)?