chore(deps): migrate typescript to v6

[nullvariant]

Summary

• Upgrade TypeScript from ^5.3.0 to ^6.0.0 (resolves to 6.0.2)
• Add explicit "types": ["node", "mocha"] to tsconfig.json to address TS6's default types: [] breaking change
• Remove esModuleInterop: true which is now always-on in TS6

Context

Replaces Renovate PR #386, which failed CI because TypeScript 6.0 changed the types compiler option default from auto-discovering all @types/* packages to [] (empty array). This caused console, setTimeout, Buffer, require, describe, it, etc. to become unresolved.

Known Considerations

• typescript-eslint does not yet officially support TS6 (typescript-eslint/typescript-eslint#12123). However, lint passes without new errors in this project (no JSX, which is where the main AST breaking change exists). A follow-up update to typescript-eslint will be needed once they ship TS6 support.
• moduleResolution: "Node16" is deprecated in TS6 but still functional. Migration to nodenext can be addressed separately as part of TS7 preparation.

Test plan

• npx tsc --noEmit passes
• npm run compile:all passes
• npm run test:all passes
• npm run test:coverage — statement coverage 100% maintained
• npm run lint:all — no new errors (existing warnings only)

[nullvariant-mimi]

🐰 Mimi's Validation Report ✅

All checks are looking good! Great job! 🎉

⏳ Some checks are still running. I will keep watching!

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バリデーターを通してくださいね

This report was carefully prepared by nullvariant-mimi[bot]

[nullvariant-luna]

👧 Luna's Exploration Report 📦

No new dependencies added. Just version bumps! Nothing to explore here... 😴

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Botに418返そうよ！

This report was curiously compiled by nullvariant-luna[bot]

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA af668d1.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

OpenSSF Scorecard

Package	Version	Score	Details
npm/typescript	^6.0.0	Unknown	Unknown
npm/typescript	6.0.2	🟢 8.2	Details Check Score Reason Code-Review 🟢 10 all changesets reviewed Packaging ⚠️ -1 packaging workflow not detected Maintained 🟢 10 30 commit(s) and 9 issue activity found in the last 90 days -- score normalized to 10 Dependency-Update-Tool 🟢 10 update tool detected License 🟢 10 license file detected Security-Policy 🟢 10 security policy file detected Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Token-Permissions 🟢 9 detected GitHub workflow tokens with excessive permissions CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Vulnerabilities 🟢 5 5 existing vulnerabilities detected Signed-Releases ⚠️ 0 Project has not signed or included provenance with any releases. Branch-Protection ⚠️ -1 internal error: error during GetBranch(release-5.9): error during branchesHandler.query: internal error: githubv4.Query: Resource not accessible by integration Binary-Artifacts 🟢 10 no binaries found in the repo SAST 🟢 10 SAST tool is run on all commits Pinned-Dependencies 🟢 6 dependency not pinned by hash detected -- score normalized to 6 Fuzzing 🟢 10 project is fuzzed CI-Tests 🟢 10 30 out of 30 merged PRs checked by a CI test -- score normalized to 10 Contributors 🟢 10 project has 35 contributing companies or organizations

Scanned Files

• extensions/git-id-switcher/package.json
• package-lock.json

[nullvariant-ciel]

🕊️ Ciel's Mediation 🌤️

*~~ floating down from the clouds ~~ The zoo seems a bit noisy today...*

3 zoo members have reviewed this PR.

Zoo Member	Status
🐰 Mimi	Commented
👧 Luna	Commented
🐗 Blaze	Commented

⚖️ The zoo has mixed opinions. Some are concerned, some are fine with it. Please review each comment carefully and make the final call.

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まあまあ、ほどほどに。

This mediation was peacefully delivered by nullvariant-ciel[bot]

[nullvariant-blaze]

🐗 Blaze's Release Review 📦

No version bump. Just dependency changes... boring. Wake me up when it's deploy time! 😤

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よっしゃ！デプロイしまくるぞ！

This review was ENTHUSIASTICALLY filed by nullvariant-blaze[bot]

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!