Release 0.6.7

[richarda23]

Summary

• Move Unreleased items into 0.6.7 changelog section
• Include changes from PRs Add missing return type hints, fix taxonomy tests, bump min Python to 3.9 #28 and Lazy-load restriction enzyme data #30 (type hints, lazy-load RE data, poetry fix)
• Bump version to 0.6.7 in pyproject.toml
• Run poetry update (faker 35.2.2 → 37.12.0, pluggy, typing-extensions updated)

Test plan

• Full suite: poetry run python -m pytest faker_biology/tests/ — 35 passed

🤖 Generated with Claude Code