deps: update eslint to v9

markdown-it-plugins/eslint.config.mjs

@@ -0,0 +1,51 @@
+import { defineConfig } from 'eslint/config'
+import typescriptEslint from '@typescript-eslint/eslint-plugin'
+import prettier from 'eslint-plugin-prettier'
+import tsParser from '@typescript-eslint/parser'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import js from '@eslint/js'
+import { FlatCompat } from '@eslint/eslintrc'
+import prettierConfig from './.prettierrc.json' with { type: 'json' }
+import vitest from '@vitest/eslint-plugin'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all
+})
+
+export default defineConfig([
+  {
+    extends: compat.extends(
+      'eslint:recommended',
+      'plugin:@typescript-eslint/eslint-recommended',
+      'plugin:@typescript-eslint/recommended-requiring-type-checking',
+      'plugin:@typescript-eslint/recommended',
+      'prettier'
+    ),
+
+    plugins: {
+      '@typescript-eslint': typescriptEslint,
+      prettier,
+      vitest
+    },
+
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 5,
+      sourceType: 'script',
+
+      parserOptions: {
+        project: ['./tsconfig.test.json']
+      }
+    },
+
+    rules: {
+      'prettier/prettier': ['error', prettierConfig],
+      ...vitest.configs.recommended.rules
+    }
+  }
+])

markdown-it-plugins/package.json

@@ -90,7 +90,7 @@
     "test:ci": "vitest --run",
     "prepublish": "rm -rf dist && yarn lint && yarn build && yarn test",
     "lint": "eslint src --ext .ts",
-    "lint:fix": "eslint --fix --ext .ts src"
+    "lint:fix": "eslint src --ext .ts --fix"
   },
   "keywords": [
     "markdown",
@@ -108,15 +108,16 @@
     "html-entities": "2.5.2"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "3.3.1",
+    "@eslint/js": "9.25.1",
     "@types/markdown-it": "13.0.8",
-    "@typescript-eslint/eslint-plugin": "8.14.0",
-    "@typescript-eslint/parser": "8.14.0",
-    "eslint": "8.57.1",
-    "eslint-config-prettier": "9.1.0",
-    "eslint-plugin-prettier": "5.2.3",
+    "@vitest/eslint-plugin": "1.1.43",
+    "eslint-config-prettier": "10.1.2",
+    "eslint-plugin-prettier": "5.2.6",
     "markdown-it": "13.0.2",
     "prettier": "3.3.3",
     "typescript": "5.6.3",
+    "typescript-eslint": "8.31.0",
     "vitest": "3.1.2"
   },
   "repository": {