chore(deps): update eslint-plugin-jest to 27.9.0

[MikeMcC399]

• supports resolution of Migrate to ESLint flat config for CI tests #529

Issue

eslint-plugin-jest is configured in package.json with version ^27.0.4 and locked to eslint-plugin-jest@27.2.1, released Jan 2023, in package-lock.json.

A minimum version of eslint-plugin-jest@27.9.0 is required to support flat config files.

Change

Update eslint-plugin-jest to eslint-plugin-jest@27.9.0 (latest 27.x version)

Note: eslint-plugin-jest@28.0.0 or above cannot yet be used, since it drops support for @typescript-eslint/eslint-plugin v5.

Verification

On Ubuntu 24.04.1 LTS, Node.js 18.20.4

git clean -xfd
npm ci
npm run lint
npm test

Ignore warnings from npm ci:

npm warn deprecated @npmcli/move-file@1.1.2: This functionality has been moved to @npmcli/fs
npm warn deprecated @humanwhocodes/config-array@0.13.0: Use @eslint/config-array instead
npm warn deprecated @humanwhocodes/object-schema@2.0.3: Use @eslint/object-schema instead
npm warn deprecated eslint@8.57.1: This version is no longer supported. Please see https://eslint.org/version-support for other options.

Confirm no errors and no uncommitted changes.

[ddzz]

I'm pretty sure CI for Windows with Node 14.x has been failing for a long time and can be ignored.

[MikeMcC399]

@ddzz

I'm pretty sure CI for Windows with Node 14.x has been failing for a long time and can be ignored.

Thanks for your comment! I was a little misled because CI managed to pass all tests in the previous PR #530, however that was probably just luck.

I've bumped the Jest timeout for only Node.js 14 to 10 seconds (instead of the default 5 seconds). Node.js 14 already had some special settings for Jest.

Ultimately Node.js 14 will need to be dropped, however I'm trying to make the changes step-by-step, so I'd plan to remove Node.js 14 and 16 sometime later. They are both in end-of-life as far as Node.js is concerned, and ESLint v9 doesn't support these versions either.