test: update eslint config to flat on eslint v8

MikeMcC399 commented 4 months ago

Issue

The ESLint configuration file .eslintrc, used with ESLint v8, is deprecated in ESLint v9 (see ESLint 8.x configuration files).

ESLint v9 was released on Apr 5, 2024 and the announcement stated that "Flat config" is now the default.

This repo currently uses the following plugins. The table also shows if they offer flat config options:

Plugin	version	flat config option
@stylistic/eslint-plugin-js	`1.7.2`	available
eslint	`8.57.0`	`pluginJs.configs.recommended`
eslint-plugin-cypress	`3.1.1`	not available
eslint-plugin-jsonc	`2.15.1`	`...eslintPluginJsonc.configs['flat/recommended-with-json']`
eslint-plugin-mocha	`10.4.3`	`mochaPlugin.configs.flat.recommended`

eslint-plugin-cypress in the current 3.1.1 release offers no out-of-the-box flat config option.

Install latest plugin versions
Install @eslint/eslintrc for Backwards compatibility utility
Replace the config file .eslintrc using eslint.config.mjs according to the documentation ESLint 8.x configuration files (new) and the documentation of each plugin.

Integrate the eslint-plugin-cypress plugin using the ESLint Backwards compatibility utility: using the FlatCompat class from the npm module @eslint/eslintrc as an interim solution.

The next planned step will be the migration to ESLint v9 after eslint-plugin-cypress has released a version compatible with ESLint v9.

npm ci
npm run lint

cypress-app-bot commented 4 months ago

Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.

cypress-app-bot commented 4 months ago

:tada: This PR is included in version 2.0.7 :tada:

The release is available on:

Your semantic-release bot :package::rocket: