chore(deps): update dependency polyfill to 9.15.0

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	minor	9.14.0 → 9.15.0

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Release Notes

SimonCropp/Polyfill (Polyfill)

v9.15.0

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]

Code Review: Dependency Update (Polyfill 9.14.0 → 9.15.0)

This is a straightforward Renovate Bot-generated dependency update — minimal surface area to review.

Change Summary

• File: TUnit.Core/TUnit.Core.targets
• Change: Version bump of the internally-managed Polyfill NuGet package version string from 9.14.0 to 9.15.0

Assessment

The change is clean and correct. A single-line version bump in the MSBuild targets file is exactly the right place for this — _TUnitPolyfillVersion is the single source of truth for the Polyfill version that TUnit auto-includes for legacy target frameworks (netstandard2.0/2.1 and .NETFramework). No other files need updating for a patch/minor version bump.

No Issues Found

• The version format is consistent with the existing convention.
• Automerge is enabled and this is a minor release (no breaking changes expected from a 9.14.0 → 9.15.0 bump in Polyfill).
• The Polyfill package is a compile-time source generator with no runtime DLL output, so version bumps carry very low risk.

Suggestion (non-blocking)

It might be worth periodically reviewing the Polyfill release notes to confirm new polyfilled APIs are actually needed or beneficial for TUnit's target frameworks — but for a minor bump this is low priority.

Verdict: LGTM. Safe to merge.

[claude]

Code Review

This is a straightforward Renovate-generated dependency update bumping the Polyfill package from 9.14.0 → 9.15.0 in TUnit.Core/TUnit.Core.targets.

Change Summary

- <_TUnitPolyfillVersion>9.14.0</_TUnitPolyfillVersion>
+ <_TUnitPolyfillVersion>9.15.0</_TUnitPolyfillVersion>

Assessment: Approved ✓

This is a minor version bump with no concerns:

• Scope is minimal — single-line change, no logic affected.
• Polyfill is a compile-time-only package — it generates source code polyfills for older target frameworks (netstandard2.0, netstandard2.1, .NETFramework). There is no runtime dependency introduced here, so the blast radius of this update is essentially zero for net8.0/net9.0/net10.0 consumers.
• Minor version bump — by semantic versioning convention, 9.14.0 → 9.15.0 is backwards-compatible and only adds new polyfills.
• Automerge is appropriate for this category of change given the project's Renovate configuration.

No architectural concerns, no issues found.