update eslint to v9

Author: mshima

eslint.config.js

@@ -0,0 +1,15 @@
+// @ts-check
+
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  { ignores: ['**/dist/**', '**/fixtures/**'] },
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'off',
+    },
+  },
+);