Linting is broken in master

[niklas-e]

Noticed npm run lint is broken in master. Root cause is recent eslint upgrade from v8 to v10. New version does no longer support .eslintrc.json or .eslintignore. I'm submitting a PR very soon.

These kind of things happen when not using automated validation pipelines. I'd recommend setting up one. I can submit a PR for it if you'd like.

~/code/phaser$ npm run lint

> phaser@4.1.0 lint
> eslint --config .eslintrc.json "src/**/*.js"

(node:534) ESLintIgnoreWarning: The ".eslintignore" file is no longer supported. Switch to using the "ignores" property in "eslint.config.js": https://eslint.org/docs/latest/use/configure/migration-guide#ignore-files
(Use `node --trace-warnings ...` to show where the warning was created)

Oops! Something went wrong! :(

ESLint: 10.2.0

TypeError [ERR_IMPORT_ATTRIBUTE_MISSING]: Module "file:///home/niklas/code/phaser/.eslintrc.json?mtime=1778942736943" needs an import attribute of "type: json"
    at validateAttributes (node:internal/modules/esm/assert:88:15)
    at defaultLoadSync (node:internal/modules/esm/load:164:3)
    at #loadAndMaybeBlockOnLoaderThread (node:internal/modules/esm/loader:796:12)
    at #loadSync (node:internal/modules/esm/loader:816:49)
    at ModuleLoader.load (node:internal/modules/esm/loader:781:26)
    at ModuleLoader.loadAndTranslate (node:internal/modules/esm/loader:526:31)
    at #getOrCreateModuleJobAfterResolve (node:internal/modules/esm/loader:577:36)
    at afterResolve (node:internal/modules/esm/loader:625:52)
    at ModuleLoader.getOrCreateModuleJob (node:internal/modules/esm/loader:631:12)
    at onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:650:32)