It was because of a simple mistake that templates without parameters weren't allowed. Let's correct it. Btw mandatory parameters are not that mandatory any more, but shhhh, don't tell anyone.
1.2.2
Now you can use !EnvironmentVariable to fill in your deployment parameters from the OS environment.
1.2.0
This release allows you to deploy Cloudformation stacksets into Organizational Units using rollout_strategy: organization. Please see the readme.
1.1.0
Allow you to split your environment configuration into multiple yaml files and then include them into one another using !Include yaml tag.
1.0.1
This tool has matured enough so we can proudly release the version 1.0 (this one is already with fixes). No you can use a pre-built Docker image (see Packages).