CircleCI config: publish new version in pip, update latest version parameter

[martinezpl]

This pipeline, upon tag push in whichever branch:

Job 1:

• spins up container on cimg/python:3.8 image
• checkouts to the trigger tag
• twine upload

Job 2:

• spins up container with aws-cli (our aws environment context applied)
• gets SSM parameter /sdk/latest_versions
• changes python version to trigger tag
• updates the SSM parameter

Tested as far as I could without actually publishing or updating the SSM parameter, everything seems fine.

@GetOn4 please look into whether this CI is safe for a public repository

[zeritte]

run publish.sh script isntead of rewriting the steps, easier to manage this way.

[zeritte]

manually trigger precommit hook before starting to deploy to ensure code quality

[martinezpl]

run publish.sh script isntead of rewriting the steps, easier to manage this way.

I can't use the script here. I would need to remove the prompt and modify the twine command anyway @zeritte