Switch to a given branch.

Create a new branch and switch to it, based off the current branch.

Pick a suitable "remote" to push to later, defaulting to one that was created previously by this tool.

Commit the changes in some given filepaths.

Pull the `master` branch.

Open a pull request, and return its number.

Push the given branch.

Fetch or create an HTTP-based remote that we can used to push via the given Github API token.

Given an activated client and a Github project, look up the version of its most recent release.