Bump kurbo to 0.13.1

[nixonyh]

Bumps the workspace kurbo dependency to 0.13.1 so downstream crates on kurbo 0.13 can use spatree without a duplicate kurbo version.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 8d7c5a9d-6a71-4b66-8c31-42e1e789be66

📥 Commits

Reviewing files that changed from the base of the PR and between 7757282 and 3653823.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• examples/vello_winit_examples/Cargo.toml

📝 Walkthrough

Walkthrough

The kurbo workspace dependency is upgraded from version 0.12.0 to 0.13.1. Feature flags remain unchanged with default-features = false preserved. This is a straightforward version bump with no code or functional changes.

Changes

Dependency Upgrade

Layer / File(s)	Summary
Kurbo version upgrade Cargo.toml	kurbo workspace dependency upgraded from 0.12.0 to 0.13.1, leaving feature flags (default-features = false) unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A rabbit hops with glee, so spry,
Dependencies fly—from old to new supply!
kurbo climbs to 0.13.1,
Geometry paths, now brighter than the sun. 🐰✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: upgrading the kurbo dependency from 0.12.0 to 0.13.1, which is the primary modification in this pull request.
Description check	✅ Passed	The description is directly related to the changeset, explaining the rationale for bumping kurbo to 0.13.1 and how it benefits downstream crates.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@Cargo.toml`:
- Line 15: Update Cargo.toml to use the actual kurbo release "0.13.0" instead of
the nonexistent "0.13.1" and audit code that relied on removed 0.12.x APIs:
search for uses of Rect::is_empty and replace with size-based checks using
Rect::size() combined with Size::is_zero_area(), and ensure any Point
construction uses Point { x, y } where needed; verify affected functions/structs
referencing kurbo types (e.g., any code manipulating Rect, Size, Point) are
adjusted to the 0.13.0 API surface so dependency resolution and compilation
succeed.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: a98c9d29-5deb-4080-a63c-8334f503dc92

📥 Commits

Reviewing files that changed from the base of the PR and between 11e802d and 7757282.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• Cargo.toml