chore(deps): update dependency polyfill to 9.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Polyfill	9.5.0 → 9.9.0

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Release Notes

SimonCropp/Polyfill (Polyfill)

v9.9.0

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v9.8.1

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v9.8.0

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v9.7.7

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• #​461 fix TaskCompletionSource namespace

v9.7.6

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• #​458 Add warning for System.Memory version < 4.5.5
• #​459 Add PolyfillNoWarnIncorrectVersion msbuild property

v9.7.5

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v9.7.4

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v9.7.3

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v9.7.2

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v9.7.1

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v9.7.0

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v9.6.0

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[deepsource-io]

DeepSource Code Review

DeepSource reviewed changes in the commit range 894313b...a1b07b5 on this pull request. Below is the summary for the review, and you can see the individual issues we found as review comments.

For detailed review results, please see the PR on DeepSource ↗

PR Report Card

Security	× 0 issues		Overall PR Quality
Reliability	× 0 issues
Complexity	× 0 issues
Hygiene	× 0 issues

Code Review Summary

Analyzer	Status	Summary	Details
C#		No new issues detected.	Review ↗

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[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅ (target: 95.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (894313b)	2056	1831	89.06%
Head commit (a1b07b5)	2056 (+0)	1831 (+0)	89.06% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#878)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[diffray]

Changes Summary

This PR updates the Polyfill NuGet package dependency from version 9.5.0 to 9.7.1. The Polyfill library provides backward compatibility features for newer C# language features in older target frameworks, which is critical for this Roslyn analyzer project targeting netstandard2.0.

Type: config

Components Affected: build-configuration, compiler-dependencies

Files Changed

File	Summary	Change	Impact
...workspace/build/targets/compiler/Packages.props	Updated Polyfill package version from 9.5.0 to 9.7.1	✏️	🟡

Architecture Impact

• Dependencies: updated: Polyfill 9.5.0 -> 9.7.1

Risk Areas: Potential API changes or behavioral differences in Polyfill 9.7.1 that could affect analyzer compilation, New polyfills or removed polyfills might affect code that relies on specific backward compatibility features, Build and test pipeline should verify compatibility with the updated version

Suggestions

• Verify all unit tests pass with the updated Polyfill version
• Check if any new polyfills in 9.7.1 provide additional features that could benefit the codebase
• Review the Polyfill changelog between 9.5.0 and 9.7.1 to understand what has changed
• Ensure the analyzer builds successfully across all target environments

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[diffray]

Changes Summary

This PR updates the Polyfill NuGet package dependency from version 9.5.0 to 9.7.2 in the compiler build targets. This is an automated dependency update by Renovate that brings in minor version improvements to the Polyfill library used in this C# analyzer project.

Type: config

Components Affected: build-configuration, compiler-dependencies

Files Changed

File	Summary	Change	Impact
...workspace/build/targets/compiler/Packages.props	Updated Polyfill package version from 9.5.0 to 9.7.2	✏️	🟢

Architecture Impact

• Dependencies: updated: Polyfill 9.5.0 → 9.7.2

Risk Areas: Compatibility with existing C# code using polyfills, Build process stability, Potential API changes in Polyfill library between minor versions

Suggestions

• Verify that all build targets compile successfully with the new Polyfill version
• Review Polyfill changelog between 9.5.0 and 9.7.2 for any behavior changes
• Run full test suite to ensure no runtime compatibility issues

---

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[diffray]

Changes Summary

This PR updates the Polyfill NuGet package dependency from version 9.5.0 to 9.7.5. The change is an automated dependency update by Renovate bot that modifies the package version specification in the MSBuild props file used for compiler targets.

Type: config

Components Affected: build-configuration, dependencies

Files Changed

File	Summary	Change	Impact
...workspace/build/targets/compiler/Packages.props	Updated Polyfill package version from 9.5.0 to 9.7.5	✏️	🟢

Architecture Impact

• Dependencies: updated: Polyfill 9.5.0 -> 9.7.5

Risk Areas: Potential behavioral changes or bug fixes in Polyfill library versions 9.5.1 through 9.7.5, Compatibility with existing code that may rely on specific polyfill behaviors from version 9.5.0

Suggestions

• Review the Polyfill changelog/release notes for versions 9.5.1 through 9.7.5 to understand what changed
• Run full test suite to ensure no regressions from the dependency update
• Verify build succeeds with the updated dependency

---

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[rjmurillo]

Polyfill 9.5.0 to 9.9.0: patch update, compiler polyfills only. All CI checks pass. Safe to merge.