v0.6.0

New features:

• Docker-compose multi-files (override support) https://github.com/lambda-my-aws/ecs_composex/issues/121

The new CLI uses positional arguments matching a specific command which drives what's executed onwards.
Trying to re-implement features as close to the docker-compose CLI as possible.

• config allows to get the YAML file render of the docker-compose files put together.
• render will put all input files together and generate the CFN templates accordingly.
• up will deploy do the same as render, and deploy to AWS CFN.