Support CloudFormation Change Sets

[naftulikay]

CloudFormation recently launched change sets, which are amazing. Can Stacks please implement an API for creating change sets so we can preview our changes before we torch production? 😅

[vaijab]

@rfkrocktk that's a good idea. I will look into that.

[naftulikay]

Thanks.

[cob16]

@vaijab would you accept a PR for this?

[vaijab]

@cob16 yes, please! /cc @alekna

[cob16]

So it looks like support for changesets will require moving the project from boto to boto3 due to the API not existing in the currently used version of the library

ref:

• http://boto.cloudhackers.com/en/latest/ref/cloudformation.html
• https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/cloudformation.html#CloudFormation.Client.create_change_set

Trying to learn from past PRs #91 I think It best to focus on increasing code coverage first before trying to upgrade (37% of code is tested at the moment)