build(deps-dev): bump @kth/eslint-config-kth from 3.7.0 to 4.0.0

[dependabot]

Bumps @kth/eslint-config-kth from 3.7.0 to 4.0.0.

Release notes

Sourced from @​kth/eslint-config-kth's releases.

v4.0.0

What's Changed

• Chore: migrate to eslint v9 by @​falric in KTH/eslint-config-kth#286

Full Changelog: KTH/eslint-config-kth@v3.7.0...v4.0.0

Changelog

Sourced from @​kth/eslint-config-kth's changelog.

4.0.0

See MIGRATING.md for details on how to upgrade from 3.x to 4.0.0.

Requires Node 20 or later

Version 4.0.0 requires Node ^20.19.0 || ^22.13.0 || >=24.

Breaking Changes

• ESLint 9 required
• Config format changed from legacy eslintrc object to flat config array

Changes

Added new dependencies:

• @babel/preset-react ^7.28.5
• globals ^16.0.0

Added peerDependencies:

• eslint ^9.0.0

Updated dev dependencies:

• eslint 9.20.0

Updated configuration:

• Converted from legacy eslintrc object to flat config array format
• Now exports an array with 3 config objects:
  • js.configs.recommended + prettierConfig
  • Main config for \*_/_.{js,jsx} files (React, JSX-A11y, React Hooks, Import, Prettier)
  • Test config for \*_/_.test.{js,jsx} etc. (Jest, Jest-DOM, Testing Library)

Commits

• b91a48a 4.0.0
• cf44a9d 4.0.0-2
• ab2c945 chore(deps): bump globals
• 2181378 chore(deps): update minor and patch
• 6cc1858 docs: update README for v4
• 95b953c Merge pull request #286 from KTH/eslint-9
• 9d185db docs: update CHANGELOG and add MIGRATING
• c9acc2b 4.0.0-1
• b5a7a05 fix: add mocks to test files configuration
• 626f23e 4.0.0-0
• Additional commits viewable in compare view

Install script changes

This version modifies prepare script that runs during installation. Review the package contents before updating.