fix: bump js-yaml from 5.2.2 to 5.4.0

[dependabot]

Bumps js-yaml from 5.2.2 to 5.4.0.

Changelog

Sourced from js-yaml's changelog.

[5.4.0] - 2026-08-25

Added

• Added the scalarStyleRules dumper option to customize string formatting. See Scalar styling for details.

Changed

• [breaking] Flattened the low-level AST node style representation. Scalar and collection nodes now use SCALAR_STYLE and COLLECTION_STYLE values; explicit tags use the separate tagged property. Alias nodes now contain only kind and anchor. This only affects code that directly constructs or edits AST nodes.
• [breaking] The sortKeys option was rewritten using AST mutation to avoid side effects.
• Reworked scalar style selection. This can change formatting without changing loaded values; in particular, whitespace-only strings are now double-quoted.

Fixed

• Accept a byte order mark at the start of each document in a stream, #791.
• Produce valid flow mappings with quoteFlowKeys and flowSkipColonSpace, including alias and property-only keys, #786.
• Preserve empty scalar items when converting block sequences to flow style.
• Do not apply the 1024-character simple-key limit to flow mapping keys.
• Count Unicode code points, rather than UTF-16 code units, for the 1024-character simple-key limit.
• Add an explicit document-end marker after keep-chomped block scalars when needed to preserve trailing newlines.

[5.3.0] - 2026-08-14

This release focuses on reworking the documentation and making small architectural improvements before moving forward.

Added

• Added completely new documentation.
• Exported DUMP_SCHEMA, the default schema used by the dumper.
• Added YAMLException.throwAt() for throwing an error at a source position.

Changed

• Changed flat constant exports to grouped exports: EVENT_ID, SCALAR_STYLE, COLLECTION_STYLE, and CHOMPING_MODE, along with their value types. The old exports are still preserved, but deprecated.
• Made identify mandatory for custom tag definitions. Use identify: () => false for load-only tags.

Deprecated

• Deprecated flat constant exports. Use grouped ones instead.

Removed

... (truncated)

Commits

• 6b4ff5e 5.4.0 released
• 3b3625e Update changelog
• 4f25a74 Fix file name
• 3bd003b Expose new scalar styling API
• fbb3e9d Remove regex lookbehind for ES2015 compatibility
• d43c185 Fix flowSkipColonSpace by forcing quoteFlowKeys
• a5fdb31 Add automatic double quoting for whitespace-only strings, close #534
• 25dcf77 Fix keep-chomped scalar test expectations
• 9f50a42 Fix open-ended tracking for document end markers
• 31aad6d Fix simple key length limit for astral characters
• Additional commits viewable in compare view

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