update to latest eslint

eslint.config.mjs

@@ -0,0 +1,40 @@
+import { FlatCompat } from "@eslint/eslintrc";
+import js from "@eslint/js";
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+import globals from "globals";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    allConfig: js.configs.all,
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended
+});
+
+export default [{
+    ignores: ["**/lib/"],
+}, ...compat.extends(
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:sort/recommended",
+), {
+    languageOptions: {
+        globals: {
+            ...globals.jest,
+            ...globals.node,
+        },
+
+        parser: tsParser,
+    },
+
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    rules: {
+        "@typescript-eslint/no-non-null-assertion": "off",
+    },
+}];

package.json

@@ -16,17 +16,20 @@
     "ts": "tsc -b"
   },
   "devDependencies": {
-    "@babel/core": "^7.23.2",
-    "@babel/preset-env": "^7.23.2",
-    "@babel/preset-typescript": "^7.23.2",
-    "@changesets/cli": "^2.26.2",
-    "@types/jest": "^29.5.7",
-    "@typescript-eslint/eslint-plugin": "^6.9.1",
-    "@typescript-eslint/parser": "^6.9.1",
-    "eslint": "^8.52.0",
-    "eslint-plugin-sort": "^2.11.0",
+    "@babel/core": "^7.24.7",
+    "@babel/preset-env": "^7.24.7",
+    "@babel/preset-typescript": "^7.24.7",
+    "@changesets/cli": "^2.27.7",
+    "@eslint/eslintrc": "^3.1.0",
+    "@eslint/js": "^9.6.0",
+    "@types/jest": "^29.5.12",
+    "@typescript-eslint/eslint-plugin": "^7.16.0",
+    "@typescript-eslint/parser": "^7.16.0",
+    "eslint": "^9.6.0",
+    "eslint-plugin-sort": "^3.0.2",
+    "globals": "^15.8.0",
     "jest": "^29.7.0",
-    "prettier": "^3.0.3",
-    "typescript": "^5.2.2"
+    "prettier": "^3.3.2",
+    "typescript": "^5.5.3"
   }
 }

packages/eslint-config-widen/package.json

@@ -1,7 +1,7 @@
 {
   "author": "Widen",
   "dependencies": {
-    "eslint-config-prettier": "^9.0.0"
+    "eslint-config-prettier": "^9.1.0"
   },
   "description": "Widen's shared ESLint config.",
   "exports": {

packages/eslint-config-widen/src/react.ts

@@ -40,6 +40,7 @@ export = {
     'react/jsx-curly-brace-presence': ['warn', 'never'],
     'react/jsx-first-prop-new-line': ['error', 'multiline'],
     'react/jsx-no-duplicate-props': 'error',
+    'react/jsx-no-useless-fragment' : 'error',
     'react/jsx-sort-props': [
       'error',
       {

packages/eslint-plugin-widen/package.json

@@ -2,9 +2,9 @@
   "author": "Widen",
   "description": "Widen's own ESLint plugin containing custom lint rules for our code.",
   "devDependencies": {
-    "@types/eslint": "^8.44.6",
-    "@types/estree-jsx": "^1.0.2",
-    "eslint": "^8.52.0",
+    "@types/eslint": "^8.56.10",
+    "@types/estree-jsx": "^1.0.5",
+    "eslint": "^9.6.0",
     "tsheredoc": "^1.0.1"
   },
   "exports": "./lib/index.js",