⬆️ Update dependency mocha to v12

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
mocha (source)	11.8.0 → 12.0.0

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Release Notes

mochajs/mocha (mocha)

v12.0.0

Compare Source

🩹 Fixes

• fixup parsing negative numbers and quoted strings (#​6250) (2962875)
• preserve FIFO descriptors when respawning (#​6254) (3bb317d)

📚 Documentation

• fix minor correctness issues (#​6215) (e6b9ee7)
• link to mochajs.org instead of the wiki (#​6216) (8720225)

🧹 Chores

• setup Release Please for v12 stable (#​6084) (219674f)

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Configuration

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♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
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The artifact failure details are included below:

File name: package-lock.json

npm warn Unknown env config "store". This will stop working in the next major version of npm. See `npm help npmrc` for supported config options.
npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: @stryker-mutator/mocha-runner@9.6.1
npm error Found: mocha@12.0.0
npm error node_modules/mocha
npm error   dev mocha@"12.0.0" from the root project
npm error
npm error Could not resolve dependency:
npm error peer mocha@">= 7.2 < 12" from @stryker-mutator/mocha-runner@9.6.1
npm error node_modules/@stryker-mutator/mocha-runner
npm error   dev @stryker-mutator/mocha-runner@"9.6.1" from the root project
npm error
npm error Conflicting peer dependency: mocha@11.8.0
npm error node_modules/mocha
npm error   peer mocha@">= 7.2 < 12" from @stryker-mutator/mocha-runner@9.6.1
npm error   node_modules/@stryker-mutator/mocha-runner
npm error     dev @stryker-mutator/mocha-runner@"9.6.1" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry this command with --force or --legacy-peer-deps to accept an incorrect (and potentially broken) dependency resolution.
npm error
npm error
npm error For a full report see:
npm error /runner/cache/others/npm/_logs/2026-09-04T02_07_56_819Z-eresolve-report.txt
npm error A complete log of this run can be found in: /runner/cache/others/npm/_logs/2026-09-04T02_07_56_819Z-debug-0.log