chore(deps): update dependency polyfill to 8.9.1

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	patch	8.9.0 -> 8.9.1

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Release Notes

SimonCropp/Polyfill (Polyfill)

v8.9.1

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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This PR has been generated by Renovate Bot.

[claude]

Claude finished @thomhurst's task —— View job

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PR Review: Polyfill Dependency Update ✅

I've completed a thorough review of this dependency update pull request. Here's my analysis:

Review Checklist:

• Analyze the changed file (Directory.Packages.props)
• Assess code quality and best practices
• Check for potential bugs or issues
• Evaluate performance considerations
• Review security concerns
• Analyze test coverage impact

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Review Summary: APPROVED ✅

This is a safe and recommended dependency update with minimal risk.

Detailed Analysis

Code Quality & Best Practices ✅

• Central Package Management: The change follows proper .NET package management practices using Directory.Packages.props
• Minimal Change: Single line change updating Polyfill from 8.9.0 → 8.9.1 (patch version)
• Consistent Versioning: All other dependencies maintain their existing versions appropriately

Potential Bugs or Issues ✅ Low Risk

• Patch Version: This is a patch release (8.9.0 → 8.9.1), indicating bug fixes only with no breaking changes
• Well-Maintained Package: Polyfill is by SimonCropp, a well-known and trusted .NET community contributor
• Limited Usage: TUnit uses Polyfill minimally - only 2 files import using Polyfills; and 1 custom polyfill extension

Performance Considerations ✅ Neutral/Positive

• Patch Release: Likely contains performance improvements or bug fixes
• Compile-Time Polyfills: Polyfill provides compile-time code generation, so runtime performance impact is minimal
• No API Changes: No changes to TUnit's usage patterns required

Security Concerns ✅ Low Risk

• Trusted Source: Package is from SimonCropp (verified maintainer)
• Patch Version: Security fixes are typically delivered in patch releases
• Limited Attack Surface: Polyfill is primarily a compile-time tool with minimal runtime footprint

Test Coverage Impact ✅ No Action Needed

• No Breaking Changes: Patch version ensures existing tests remain valid
• Automated Testing: The PR will be validated by TUnit's existing CI/CD pipeline
• Polyfill Usage: TUnit's usage is limited to basic polyfill functionality that's unlikely to change

Specific Code Analysis

Current TUnit Usage of Polyfill:

• TUnit.Engine/Utilities/ScopedAttributeFilter.cs:2 - Uses polyfill extensions
• TUnit.Engine/Discovery/ReflectionHookDiscoveryService.cs:5 - Uses polyfill extensions
• TUnit.Engine/PolyfillExtensions.cs - Custom string polyfill methods

Impact Assessment: Minimal - TUnit primarily uses standard polyfill functionality that's stable across patch versions.

Recommendation

✅ APPROVE AND MERGE

This dependency update should be merged as it:

1. Follows semantic versioning (patch release)
2. Comes from a trusted maintainer
3. Has minimal impact on TUnit's codebase
4. Likely includes bug fixes or improvements
5. Maintains compatibility with existing code

The automerge configuration is appropriate for this type of low-risk dependency update.

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