chore: fix npm dependency resolution

[tonyganchev]

Description

Folks, I am running an ecosystem test for your repo to guard against regressions in @tony.ganchev/eslint-plugin-header.

Starting today the job started failing not being able to resolve typescript@6 and @typescript-eslint/eslint-plugin@8.56.1: https://github.com/tonyganchev/eslint-plugin-header/actions/runs/23889574119/job/69659629545

The issue is also reproducible locally and started since 27276e2 which updated typescript to 6.0.2.:

npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: @typescript-eslint/eslint-plugin@8.57.0
npm error Found: typescript@6.0.2
npm error node_modules/typescript
npm error   dev typescript@"^6.0.2" from the root project
npm error   peerOptional typescript@">=4.9.5" from cosmiconfig@9.0.1
npm error   node_modules/cosmiconfig
npm error     cosmiconfig@"^9.0.0" from postcss-loader@8.2.1
npm error     node_modules/postcss-loader
npm error       dev postcss-loader@"^8.2.1" from the root project
npm error     cosmiconfig@"^9.0.0" from stylelint@17.4.0
npm error     node_modules/stylelint
npm error       dev stylelint@"^17.4.0" from the root project
npm error       6 more (stylelint-config-recommended, ...)
npm error   2 more (ts-api-utils, ts-loader)
npm error
npm error Could not resolve dependency:
npm error peer typescript@">=4.8.4 <6.0.0" from @typescript-eslint/eslint-plugin@8.57.0
npm error node_modules/@typescript-eslint/eslint-plugin
npm error   dev @typescript-eslint/eslint-plugin@"^8.56.1" from the root project
npm error
npm error Conflicting peer dependency: typescript@5.9.3
npm error node_modules/typescript
npm error   peer typescript@">=4.8.4 <6.0.0" from @typescript-eslint/eslint-plugin@8.57.0
npm error   node_modules/@typescript-eslint/eslint-plugin
npm error     dev @typescript-eslint/eslint-plugin@"^8.56.1" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.
npm error

I've bumped the offending @typescript-eslint/eslint-plugin to v.8.58.0 and it resolved the issue. make lint passed as well.

Related Issue

Fixes #

Checklist

• There is an associated issue labeled bug or enhancement
• Code is up-to-date with the main branch
• npm test passes locally
• New or updated tests validate the change

[xdan]

Thanks a lot for catching this and for the thorough write-up, @tonyganchev! 🙏

This is the same problem as #1368. It's now fixed and released in 4.12.5 — I bumped both @typescript-eslint/eslint-plugin and @typescript-eslint/parser to ^8.60.1 and regenerated the lockfile, so npm ci resolves cleanly with TypeScript 6.

Closing this as resolved by that release, but very much appreciated.