Bump version; floodplain data update; pin core 'v0.9.1'

[dalmijn]

Issue addressed

Fixes no particular issue

Explanation

Bump and update some stuff

Checklist

• [x] Updated tests or added new tests
• [x] Branch is up to date with main
• [x] Tests & pre-commit hooks pass
• [x] Updated documentation if needed

Additional Notes (optional)

Add any additional notes or information that may be helpful.