eslint 9.x compatibility

.gitignore

@@ -1,2 +1,2 @@
 node_modules/
-yarn.lock
+package-lock.json

index.js

@@ -1,26 +1,23 @@
-/**
- * @type {import("eslint").Linter.Config}
- */
-module.exports = {
-  extends: [
-    "eslint:recommended",
-  ],
-  parserOptions: {
+export default [{
+  languageOptions: {
+      ecmaVersion: 2018,
       sourceType: "module",
-    ecmaVersion: 2018, // recommended minimum target, probably overridden by project
   },
+
   rules: {
-    // Stylistic:
       "brace-style": "error",
-    "camelcase": ["error", {
+
+      camelcase: ["error", {
           properties: "never",
           ignoreDestructuring: true,
       }],
+
       "comma-dangle": ["error", "always-multiline"],
       "comma-spacing": "error",
       "comma-style": "error",
-    "curly": ["error", "all"],
+      curly: ["error", "all"],
       "func-call-spacing": "error",
+
       "max-len": ["warn", {
           code: 120,
           tabWidth: 2,
@@ -30,77 +27,91 @@ module.exports = {
           ignoreTemplateLiterals: true,
           ignoreRegExpLiterals: true,
       }],
-    "no-multiple-empty-lines": ["error", { max: 1 }],
+
+      "no-multiple-empty-lines": ["error", {
+          max: 1,
+      }],
+
       "no-tabs": "error",
       "no-trailing-spaces": "error",
       "object-curly-spacing": ["error", "always"],
+
       "one-var": ["error", {
           var: "never",
           let: "never",
           const: "never",
       }],
+
       "operator-linebreak": ["error", "after"],
       "padded-blocks": ["error", "never"],
       "quote-props": ["error", "consistent-as-needed"],
-    "quotes": ["error", "double", {
+
+      quotes: ["error", "double", {
           avoidEscape: true,
           allowTemplateLiterals: true,
       }],
-    "semi": "error",
+
+      semi: "error",
       "semi-spacing": "error",
       "space-before-blocks": "error",
+
       "space-before-function-paren": ["error", {
           named: "never",
           anonymous: "always",
           asyncArrow: "always",
       }],
+
       "spaced-comment": ["error", "always", {
           line: {
               markers: ["/"],
               exceptions: ["-", "+"],
           },
+
           block: {
               markers: ["!"],
               exceptions: ["*"],
               balanced: true,
           },
       }],
+
       "template-tag-spacing": ["error", "never"],
 
-    // ES6:
       "arrow-body-style": ["error", "as-needed", {
           requireReturnForObjectLiteral: false,
       }],
+
       "arrow-parens": ["error", "always"],
-    "arrow-spacing": ["error", { before: true, after: true }],
-    "no-confusing-arrow": ["error", { allowParens: true }],
+
+      "arrow-spacing": ["error", {
+          before: true,
+          after: true,
+      }],
+
+      "no-confusing-arrow": ["error", {
+          allowParens: true,
+      }],
+
       "no-var": "error",
+
       "prefer-const": ["error", {
           destructuring: "any",
           ignoreReadBeforeAssign: true,
       }],
+
       "prefer-destructuring": ["error", {
           VariableDeclarator: {
               array: false,
               object: true,
           },
+
           AssignmentExpression: {
               array: true,
               object: false,
           },
       }],
+
       "prefer-rest-params": "error",
       "prefer-spread": "error",
       "template-curly-spacing": "error",
   },
-  overrides: [
-    {
-      // TODO: JS-only config
-      files: ["*.js"],
-    },
-    {
-      // TODO: TypeScript-only config
-      files: ["*.ts"],
-    },
-  ],
-};
+}];

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@jakejarvis/eslint-config",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "description": "My ESLint config. Inspired heavily by eslint-config-google and moderately by eslint-config-airbnb.",
   "license": "MIT",
   "repository": "jakejarvis/eslint-config",
@@ -13,22 +13,11 @@
     "index.js"
   ],
   "main": "index.js",
-  "scripts": {
-    "lint": "eslint .",
-    "lint:fix": "eslint --fix ."
-  },
-  "dependencies": {},
   "devDependencies": {
-    "eslint": "^8.15.0"
+    "eslint": "^9.4.0"
   },
   "peerDependencies": {
-    "eslint": "^7 || >=8"
-  },
-  "eslintConfig": {
-    "extends": "./index.js",
-    "env": {
-      "node": true
-    }
+    "eslint": "^7 || ^8 || >=9"
   },
   "keywords": [
     "javascript",