Concierge-cli

Changes

This is a maintenance release, there are no feature changes.

- Make it easier to update dependencies (and align `requirements.txt` and `Pipfile.lock`)
- Support Python 3.8
- Integrate Renovate

Features

- Manage GitLab project topics ("tags")
- List GitLab projects (e.g. by topics)
- Manage group memberships (e.g. set permissions on project groups)

Supported Python versions: 3.6, 3.7