Feature request: support detection of project repository and version

[nicojs]

Hi 👋

Awesome idea for an open-source project! Would you care to broaden the scope a little bit? It would be awesome if this dependency could detect even more stuff, like which repository the current ci build is running on and which version (branch, tag, git sha) is being build.

Inspiration: https://github.com/stryker-mutator/stryker/tree/master/packages/core/src/reporters/ci