chore(deps): update dependency polyfill to v10

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	major	9.24.1 → 10.0.0

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Release Notes

SimonCropp/Polyfill (Polyfill)

v10.0.0

Compare Source

• #​515 Add new static extension polyfills using C# 14 syntax
• #​516 Consider migrating Directory polyfills to extension(Directory) syntax
• #​518 Add IndexOfAnyExcept and LastIndexOfAnyExcept
• #​519 Migrate Directory polyfills to extension(Directory) syntax

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[claude]

Code Review

PR: Bump Polyfill from 9.24.1 → 10.0.0 (major version)

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Summary

Single-line change in Directory.Packages.props. All projects using Central Package Management will automatically pick up the new version.

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Analysis

Change scope: The diff is minimal and correct — this is the right place to update a centrally-managed package version.

Major version bump — what changed in v10:

• Added new static extension polyfills using C# 14 syntax (extension(T) syntax)
• Added IndexOfAnyExcept / LastIndexOfAnyExcept polyfills
• Migrated Directory polyfills to the new extension(Directory) syntax

Compatibility assessment:

• ✅ C# 14 syntax — TUnit sets LangVersion = preview, so C# 14 static extension syntax is supported.
• ✅ Additive changes — The release notes indicate new polyfills were added, not removed. No breaking API changes are documented.
• ⚠️ AOT compatibility — The extension(Directory) syntax is a new C# 14 feature. TUnit has a strict Native AOT requirement. The Polyfill library itself is designed to be source-generator-based (compile-time, no runtime reflection), so AOT impact should be minimal — but CI results should confirm this before merge.
• ✅ No snapshot changes needed — This doesn't affect source generator output, so no .verified.txt updates are expected.

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Verdict

The change looks correct. The major version bump is driven by C# 14 syntax adoption in the Polyfill library itself, not by breaking API removals, making it lower-risk than a typical major bump. Auto-merge is reasonable here contingent on all CI checks (especially any AOT/NativeAOT build targets) passing cleanly.

[codacy-production]

Up to standards ✅

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