chore(deps): update tunit to 1.18.21

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
TUnit	nuget	patch	1.18.9 → 1.18.21
TUnit.AspNetCore	nuget	patch	1.18.9 → 1.18.21
TUnit.Assertions	nuget	patch	1.18.9 → 1.18.21
TUnit.Assertions.FSharp	nuget	patch	1.18.9 → 1.18.21
TUnit.Core	nuget	patch	1.18.9 → 1.18.21
TUnit.Engine	nuget	patch	1.18.9 → 1.18.21
TUnit.Playwright	nuget	patch	1.18.9 → 1.18.21

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Release Notes

thomhurst/TUnit (TUnit)

v1.18.21: 1.18.21

What's Changed

Other Changes

• avoid some string alloc by using AppendJoin by @​SimonCropp in #​4971
• respect attribute namespace during migration by @​SimonCropp in #​5066
• fix: parent data source initialization spans under session span by @​thomhurst in #​5071

Dependencies

• chore(deps): update tunit to 1.18.9 by @​thomhurst in #​5060
• chore(deps): update dependency polyfill to 9.14.0 by @​thomhurst in #​5063
• chore(deps): update dependency microsoft.testing.extensions.codecoverage to 18.5.2 by @​thomhurst in #​5065
• chore(deps): update dependency polyfill to 9.14.0 by @​thomhurst in #​5062
• chore(deps): update actions/github-script action to v8 by @​thomhurst in #​5053
• chore(deps): update dependency polyfill to 9.15.0 by @​thomhurst in #​5067
• chore(deps): update dependency polyfill to 9.15.0 by @​thomhurst in #​5068

Full Changelog: v1.18.9...v1.18.21

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This PR has been generated by Renovate Bot.

[claude]

Code Review: chore(deps): update tunit to 1.18.21

This is a standard Renovate-generated patch version bump across 6 files, updating all TUnit-family packages from 1.18.9 → 1.18.21.

Summary of Changes

File	Change
Directory.Packages.props	Updates 6 Central Package Management entries
TUnit.Templates/content/TUnit.AspNet.FSharp/...	Updates 2 hardcoded package refs
TUnit.Templates/content/TUnit.AspNet/...	Updates 1 hardcoded package ref
TUnit.Templates/content/TUnit.FSharp/...	Updates 2 hardcoded package refs
TUnit.Templates/content/TUnit.Playwright/...	Updates 1 hardcoded package ref
TUnit.Templates/content/TUnit.VB/...	Updates 1 hardcoded package ref

Release Notes Notable Changes (1.18.9 → 1.18.21)

• Perf: Reduced string allocations via AppendJoin (#4971)
• Bug fix: Attribute namespace now respected during migration (#5066)
• Bug fix: Parent data source initialization spans correctly placed under session span (#5071)

Assessment

The changes are correct and consistent. The dual update strategy is architecturally sound:

• Main project uses Central Package Management via Directory.Packages.props ✓
• Template projects under TUnit.Templates/content/ intentionally use hardcoded versions since they are distributed as standalone starter templates for end users and cannot rely on the repo's CPM setup ✓

All 13 version strings are updated uniformly to 1.18.21. No issues found.

Approved — safe to merge.