Sourced from js-yaml's changelog.

[5.2.1] - 2026-07-02

Fixed

• Add Map support to !!omap (should work when realMapTag used)

Security

• Remove quadratic complexity from !!omap addItem. Regression from v5 (usually not critical, because YAML11_SCHEMA is not default anymore).

• ac16b42 5.2.1 released
• 4a864e5 Deps bump
• 39f3211 !!omap: add Map support and remove quadratic complexity
• ff17f1e Changelog update
• 8ed15f1 deps bump
• 1a562dc Fix changelog link
• c28ed5e 5.2.0 released
• 125cd5a Add maxAliases option
• 3105455 Replace maxMergeSeqLengthoption with maxTotalMergeKeys (more robust)
• 39d00d6 numbers: Drop boxed numbers support, simplify .identify() checks, clarify rou...
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