chore(deps): update dependency eslint to v9 (#125)

* chore(deps): update dependency eslint to v9

* chore(dev-deps): eslint v9

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: AriPerkkio <ari.perkkio@gmail.com>

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
 
         strategy:
             matrix:
-                node-version: [16, 18]
+                node-version: [18, 20]
 
         steps:
             - uses: actions/checkout@v4
@@ -43,7 +43,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                node-version: [16, 18]
+                node-version: [18, 20]
                 example-name:
                     [
                         example-jest,

.github/workflows/publish.yml

@@ -24,7 +24,7 @@ jobs:
 
             - uses: actions/setup-node@v4
               with:
-                  node-version: '16'
+                  node-version: '18'
                   registry-url: 'https://registry.npmjs.org'
 
             - name: Install & Build

eslint.config.mjs

@@ -0,0 +1,41 @@
+import js from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import globals from 'globals';
+
+export default defineConfig([
+    js.configs.recommended,
+    ...tseslint.configs.recommended,
+    {
+        languageOptions: {
+            ecmaVersion: 2020,
+            sourceType: 'module',
+            globals: {
+                ...globals.node,
+                ...globals.jasmine,
+            },
+        },
+    },
+    {
+        rules: {
+            '@typescript-eslint/ban-types': 'off',
+            '@typescript-eslint/no-explicit-any': 'off',
+            '@typescript-eslint/no-namespace': 'off',
+            '@typescript-eslint/triple-slash-reference': 'off',
+            '@typescript-eslint/no-empty-interface': 'off',
+        },
+    },
+    {
+        files: ['*.test.ts*'],
+        rules: {
+            '@typescript-eslint/no-non-null-assertion': 'off',
+        },
+    },
+    { ignores: ['dist'] },
+    eslintPluginPrettierRecommended,
+]);
+
+/** @param config {import('eslint').Linter.FlatConfig} */
+function defineConfig(config) {
+    return config;
+}

package.json

@@ -44,7 +44,7 @@
         "build": "rollup --config rollup.config.ts --configPlugin typescript",
         "test": "vitest run",
         "test:watch": "vitest watch",
-        "lint": "eslint . --max-warnings 0 --ext .js,.ts",
+        "lint": "eslint . --max-warnings 0",
         "validate": "pnpm build && pnpm lint && pnpm test"
     },
     "repository": {
@@ -57,14 +57,14 @@
         "aria-live-capture": "^1.0.2"
     },
     "devDependencies": {
+        "@eslint/js": "^9.1.1",
         "@types/node": "^20.12.7",
-        "@typescript-eslint/eslint-plugin": "^7.6.0",
-        "@typescript-eslint/parser": "^7.6.0",
         "@vitest/expect": "^1.5.0",
         "esbuild": "^0.20.2",
-        "eslint": "^8.57.0",
+        "eslint": "^9.1.0",
         "eslint-config-prettier": "^9.1.0",
         "eslint-plugin-prettier": "^5.1.3",
+        "globals": "^15.0.0",
         "jsdom": "^24.0.0",
         "prettier": "^3.2.5",
         "rollup": "^4.14.2",
@@ -73,6 +73,7 @@
         "rollup-plugin-local-import": "^1.2.0",
         "rollup-plugin-typescript": "^1.0.1",
         "typescript": "^5.4.5",
+        "typescript-eslint": "^7.7.0",
         "vitest": "^1.5.0"
     },
     "packageManager": "pnpm@8.15.7",