Allow topic-creation-times to be edited.
Allow topic-creation-times to be edited.

This is a missing piece of functionality which is the best
current way to set the timestamp upon a new topic, as it
cannot be specified when a topic is created.

For reference please see:

* https://meta.discourse.org/t/set-the-date-of-a-new-topic-via-the-api/43308

RyzacInc/discourse_api,discourse/discourse_api,spatten/discourse_api,melissawahnish/discourse_api,Odyl/discourse_api,oblakeerickson/discourse_api,techAPJ/discourse_api