Updated Cedar-14 stack image

Change effective on 25 January 2018

The Cedar-14 stack image has been updated. This update applies routine package upgrades.

The new stack image will be rolled out automatically in the next 24 hours. You do not need to redeploy your app or restart your dynos.

See this Dev Center article for an overview of the libraries available on the Cedar-14 and Heroku-16 stack images.