chore: update deps for iroh v1.0.0 release

[rustonbsd]

Release Notes for v0.2.0

Package Updates

• Version: Updated from 0.2.0-pre.1 to 0.2.0

Dependency Upgrades

• iroh: Bumped to v1 (major version release from 1.0.0-rc.1)
• sha2: Updated to 0.11.0 (from 0.10)
• hkdf: Updated to 0.13.0
• n0-watcher: Bumped to v1 (from 0.6)
• iroh-gossip (optional): Updated to 0.101 (from 0.100)

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: a5c02fa8-a67b-48d0-adac-cf57ccc0cfd8

📥 Commits

Reviewing files that changed from the base of the PR and between 67b529e and a27a353.

📒 Files selected for processing (2)

• README.md
• src/tests.rs

📝 Walkthrough

Walkthrough

Cargo.toml promotes the crate version from 0.2.0-pre.1 to 0.2.0 and updates dependency constraints: iroh to 1, hkdf to 0.13.0, sha2 to 0.11.0, n0-watcher to 1, and optional iroh-gossip to 0.101.

Changes

Release 0.2.0

Layer / File(s)	Summary
Crate version and dependency updates Cargo.toml	Crate version promoted from 0.2.0-pre.1 to 0.2.0; iroh bumped to major 1, hkdf to 0.13.0, sha2 to 0.11.0, n0-watcher to 1, and optional iroh-gossip to 0.101.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main change: updating dependencies for the iroh v1.0.0 release, which matches the Cargo.toml version bumps.
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 3: The installation documentation in README.md contains pre-release
version specifiers that no longer match the stable release promoted in
Cargo.toml. Update the README.md installation snippet to replace the pre-release
dependency versions (iroh-auth = "0.2.0-pre.1" and iroh = "1.0.0-rc.1") with
their corresponding stable versions that align with the 0.2.0 stable release now
shown in Cargo.toml.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

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

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 8d933187-f823-4f1b-9006-cb96a8ec6725

📥 Commits

Reviewing files that changed from the base of the PR and between 1a12e65 and 67b529e.

⛔ Files ignored due to path filters (1)

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

📒 Files selected for processing (1)

• Cargo.toml