Update dependency js-yaml to v4.2.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
js-yaml	4.1.1 → 4.2.0

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Release Notes

nodeca/js-yaml (js-yaml)

v4.2.0

Compare Source

Added

• Added docs/safety.md with notes about processing untrusted YAML.
• Added maxDepth (100) loader option. Not a problem, but gives a better
  exception instead of RangeError on stack overflow.
• Added maxMergeSeqLength (20) loader option. Not a problem after merge fix,
  but an additional restriction for safety.
• Added sourcemaps to dist/ builds.

Changed

• Stop resolving numbers with underscores as numeric scalars, #​627.
• Switched dev toolchains to Vite / neostandard.
• Updated demo.
• Reorganized tests.
• dist/ files are no longer kept in the repository.

Fixed

• Fix parsing of properties on the first implicit block mapping key, #​62.
• Fix trailing whitespace handling when folding flow scalar lines, #​307.
• Reject top-level block scalars without content indentation, #​280.
• Ensure numbers survive round-trip, #​737.
• Fix test coverage for issue #​221.
• Fix flow scalar trailing whitespace folding, #​307.
• Fix digits in YAML named tag handles.

Security

• Fix potential DoS via quadratic complexity in merge - deduplicate repeated
  elements (makes sense for malformed files > 10K).

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[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 file)

• package.json - Dependency version update from js-yaml 4.1.1 to 4.2.0

Review Notes

This PR updates js-yaml from 4.1.1 to 4.2.0, which includes:

• Security fix for potential DoS via quadratic complexity in merge operations
• Multiple bug fixes for YAML parsing edge cases
• New loader options for additional safety (maxDepth, maxMergeSeqLength)
• No breaking changes

The update is a minor version bump with security improvements and bug fixes. The change is appropriate for merging.

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_{Reviewed by claude-4.5-sonnet-20250929 · 188,587 tokens}