v0.4.0

Added

• Support for the Dagre layout by including the cytoscape-dagre dependency.
  Thanks to @drachenbach for the PR. (#39)
• 9 new Material icons to frontend assets. (#47)
• Support for dynamically loading debug pages from the examples/debug/ directory in demo's app.py
• mypy in the development workflow. Updated type hints throughout the codebase.

Fixed

• Prevent accumulating multiple .svg extensions on repeated calls of dump
  method with the same initialization of NodeStyle (#48)

Changed

• Increased the minimum required Python version to 3.9.
• Updated frontend dependencies in package.json and package-lock.json.
• Added test-related packages under the [project.optional-dependencies.dev]
  section in pyproject.toml.
• Updated README.md to installing development dependencies using
  pip install -e ".[dev]" instead of pip install -r tests/requirements.txt

---

Full Changelog: v0.3.0...v0.4.0