Release v0.4.0

• require python 3.8
• update dependencies
• update tools
• move from flake8 & pyupgrade to ruff
• fix coverage

Release v0.3.1

• read inline images

Release v0.3.0

• type hints

Release v0.2.0

• fork
• update tooling (poetry, black, isort, pre-commit)
• drop nosetests for unittest