Poetry for rasa-sdk 🎉

[alwx]

Proposed changes:

• Add poetry to rasa-sdk
• Update Dockerfile (=> reduce the size of Docker image from 400 to about 200 Mb)
• Update dependencies

Status (please check what you already did):

• made PR ready for code review
• added some tests for the functionality
• updated the documentation
• updated the changelog
• reformat files using black (please check Readme for instructions)

IMPORTANT: Things to do before merging this PR:

• Merge added towncrier for changelog management #146
• Set up Travis encryption keys: https://docs.travis-ci.com/user/encryption-keys#usage

[tmbo]

great work - looks a lot easier to maintain 🎉

I've added a couple comments regarding metadata that is missing and some open questions.

[tmbo]

one more open question: does publishing the package using travis deploy still work?

[wochinge]

Great work @alwx 💯

[alwx]

Now it also includes changes from #146

Additional changes:

• docker image is now based on python3.6-slim, not alpine
• scripts/release.py automatically changes version in pyproject.toml as well
• all the dependencies have been updated
• metadata in pyproject.toml
• deploy build step in .travis.yml updated

[wochinge]

🎉 Stoked for poetry :-)

[alwx]

Things to do before merging this PR:

• Merge added towncrier for changelog management #146
• Set up Travis encryption keys: https://docs.travis-ci.com/user/encryption-keys#usage

outdated

[tmbo]

@alwx is the used password env already the correct one?

[alwx]

@tmbo no, it's not — it should be updated first.

[tmbo]

I've encrypted the secret and suggested the change @alwx

[wochinge]

@alwx Why did we remove coveralls?

[wochinge]

Looks great 💯