Issue 16: Add release it to handle version bumps

Adds release-it json file to handle version bumps.

Bumps common pipeline version so that release-it runs.

Tests running locally (although not in CI/CD) were broken, due to updates to the Dockerfile not being captured in the docker-compose configuration as well.

Also changed user to root for running tox. This is required to allow tox to install dependencies into the tox environments, which are mounted as volumes when tox runs locally.

Closes #16 (closed)