Request: re-use latest task definition if not changed

[Eli-Goldberg]

We run this tool as a part of a daily batch process (and it's great).

However - task definitions are created for each run, and that's not ideal.
Could we compare the new one to the latest and reuse in case the definition is the same?

If it's acceptable behavior I could implement and open a PR.

[Eli-Goldberg]

I have a ready implementation. Will open a PR soon