ROADMAP

Project name and other settings could come from pyproject.toml
Materialize the Step interface and validate all steps against it
Infer github_user setting from .git/config
Also autodiscover github_repository
Use subcommands: "releaser go"
Create subcommand that adds new git commits to the top of CHANGES.rst

New steps to implement

Optionally xdg-open the wheel for convenience
CompileAndVerifyTranslations