Explicitly state reference versions for all dependencies

[cdboer]

Required Dependencies

• prov (newest v2.0.0, confirmed working)
• git-python (latest v3.1.30)
• python-gitlab (latest stable v3.13.0)
• jsonschema (latest stable v4.17.3)
• ruamel.yaml (latest stable v0.17.21)
• pydot (latest v1.4.2)
• click (latest stable v8.1.3)

Optional Dependencies

• pytest (latest v7.2.2)

• pytest-mock (v3.10.0)

• black (latest 23.3.0)

• isort (latest 5.12.0)

• bump2version (latest 1.0.1)

• [ ] Should Use Dependabot Action