automate CI

[lavie]

• Auto-publish to pypi on successful master build.
• Auto push to dockerhub.
• Autogen release notes and create github release draft.

[lavie]

https://docs.travis-ci.com/user/build-stages

[reconman]

Check https://github.com/marvinpinto/action-automatic-releases#create-a-new-github-release-when-tags-are-pushed-to-the-repository for automatic release notes.

I'm using it in FGA to produce release notes like this: https://github.com/Fate-Grand-Automata/FGA/releases. It uses the Automatically generate a pre-release when changes land on master part because I don't use releases for that project. Users can only download the latest APK.

[lavie]

honestly, the releases aren't crucial to the project. since most users will pull the tool with pip or docker, it's not super critical to also create releases. the releases are mostly a way to thank contributors and inform users of major features being added.