build(deps): bump immutable from 4.3.8 to 4.3.9

[dependabot]

Bumps immutable from 4.3.8 to 4.3.9.

Release notes

Sourced from immutable's releases.

v4.3.9

What's changed

• fix(List): guard oversized bounds in setListBounds. Fixes CVE GHSA-v56q-mh7h-f735
• perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE GHSA-xvcm-6775-5m9r

Full Changelog: immutable-js/immutable-js@v4.3.8...v4.3.9

Changelog

Sourced from immutable's changelog.

4.3.9

• fix(List): guard oversized bounds in setListBounds. Fixes CVE GHSA-v56q-mh7h-f735
• perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE GHSA-xvcm-6775-5m9r

5.1.7

• fix(Repeat): lastIndexOf returned size instead of size - 1 by @​chatman-media in immutable-js/immutable-js#2227. Fixes CVE CVE-2026-29063
• fix(IndexedCollection): has(index) on a lazy Seq of unknown size now checks index existence instead of searching for a value equal to the index #2203
• [TypeScript]: reduce/reduceRight without an initial value now infer the result type from the collection's values when the reducer returns a value (e.g. list.reduce((a, b) => a + b) infers number), matching Array#reduce. Previously an explicit type argument was required. #2205

5.1.6

• fix(reverseFactory): read reversedSequence.size in __iterator instead of this #2196

5.1.5

• Fix Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

5.1.4

• Migrate some files to TS by @​jdeniau in immutable-js/immutable-js#2125
  • Iterator.ts
  • PairSorting.ts
  • toJS.ts
  • Math.ts
  • Hash.ts
• Extract CollectionHelperMethods and convert to TS by @​jdeniau in immutable-js/immutable-js#2131
• Use npm trusted publishing only to avoid token stealing.

Documentation

• Fix/a11y issues by @​lyannel in immutable-js/immutable-js#2136
• Doc add Map.get signature update by @​borracciaBlu in immutable-js/immutable-js#2138
• fix(doc):minor-issues#2132 by @​JayMeDotDot in immutable-js/immutable-js#2133
• Fix algolia search by @​jdeniau in immutable-js/immutable-js#2135
• Typo in OrderedMap by @​jdeniau in immutable-js/immutable-js#2144

Internal

• chore: Sort all imports and activate eslint import rule by @​jdeniau in immutable-js/immutable-js#2119

5.1.3

TypeScript

• fix: allow readonly map entry constructor by @​septs in immutable-js/immutable-js#2123

Documentation

... (truncated)

Commits

• 5da7919 4.3.9
• 794a1a9 Merge commit from fork
• 3dd7e56 perf(Map): index large hash-collision buckets for faster lookups
• 62d0b58 fix ts in tests
• 8c0e5f8 Merge commit from fork
• f0bc997 Merge commit from fork
• 8ac83f4 change tag
• f7373e5 use id-token to deploy 4.x version
• 2f545ad changelog
• See full diff in compare view

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[github-actions]

Dependency Review

✅ No vulnerabilities or OpenSSF Scorecard issues found.

OpenSSF Scorecard

Package	Version	Score	Details
npm/immutable	4.3.9	🟢 6.6	Details Check Score Reason Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Code-Review ⚠️ 0 Found 1/14 approved changesets -- score normalized to 0 Security-Policy 🟢 10 security policy file detected Maintained 🟢 10 30 commit(s) and 5 issue activity found in the last 90 days -- score normalized to 10 Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Binary-Artifacts 🟢 10 no binaries found in the repo CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Pinned-Dependencies 🟢 5 dependency not pinned by hash detected -- score normalized to 5 License 🟢 10 license file detected Fuzzing 🟢 10 project is fuzzed Signed-Releases ⚠️ -1 no releases found Branch-Protection 🟢 3 branch protection is not maximal on development and all release branches Packaging 🟢 10 packaging workflow detected SAST 🟢 8 SAST tool is not run on all commits -- score normalized to 8

Scanned Files

• package-lock.json