chore: update eslint and use flat config

eslint.config.js

@@ -0,0 +1,64 @@
+// @ts-check
+
+import eslint from '@eslint/js'
+import tseslint from 'typescript-eslint'
+import vitest from '@vitest/eslint-plugin'
+import eslintConfigPrettier from 'eslint-config-prettier'
+import globals from 'globals'
+
+export default tseslint.config(
+  {
+    languageOptions: {
+      sourceType: 'module'
+    },
+    linterOptions: {
+      reportUnusedDisableDirectives: 'error'
+    }
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...tseslint.configs.stylistic,
+  {
+    files: ['**/*.{js,mjs}'],
+    rules: {
+      'no-unused-vars': ['error', { argsIgnorePattern: '^_' }]
+    }
+  },
+  {
+    rules: {
+      'no-empty': ['error', { allowEmptyCatch: true }],
+      '@typescript-eslint/no-unused-vars': 'off',
+      '@typescript-eslint/member-delimiter-style': 'off',
+      '@typescript-eslint/consistent-type-imports': 'error',
+      '@typescript-eslint/consistent-type-definitions': ['error', 'type'],
+      '@typescript-eslint/array-type': ['error', { default: 'array-simple' }]
+    }
+  },
+  {
+    files: [
+      'examples/**/*.{js,mjs}',
+      'tests/examples-overrides/**/*.{js,mjs}',
+      'tests/fixtures/**/*.{js,mjs}'
+    ],
+    languageOptions: {
+      globals: globals.browser
+    }
+  },
+  {
+    files: [
+      'examples/**/backend-src/**/*.{js,mjs}',
+      'examples/**/server.{js,mjs}'
+    ],
+    languageOptions: {
+      globals: globals.node
+    }
+  },
+  {
+    files: ['tests/**/*.{js,ts}'],
+    ...vitest.configs.recommended
+  },
+  eslintConfigPrettier,
+  {
+    ignores: ['dist/**', '.examples-temp/**', 'tests/.fixtures-temp/**']
+  }
+)

package.json

@@ -11,12 +11,12 @@
   },
   "packageManager": "[email protected]",
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "^6.11.0",
-    "@typescript-eslint/parser": "^6.11.0",
-    "eslint": "^8.54.0",
-    "eslint-config-prettier": "^9.0.0",
-    "eslint-plugin-vitest": "^0.3.9",
+    "@vitest/eslint-plugin": "^1.1.12",
+    "eslint": "^9.15.0",
+    "eslint-config-prettier": "^9.1.0",
+    "globals": "^15.12.0",
     "prettier": "^3.1.0",
-    "typescript": "^5.2.2"
+    "typescript": "^5.2.2",
+    "typescript-eslint": "^8.16.0"
   }
 }