chore: update ESLint peer dependency to version 9.31.0 and improve rule merging

Author: Pascal Klesse

packages/eslint-config-vue/index.js

@@ -52,9 +52,9 @@ export default [
       "@stylistic": stylistic,
     },
     rules: {
-      ...perfectionist.configs["recommended-natural"].rules,
-      ...vue.configs["vue3-recommended"].rules,
-      ...typescript.configs["recommended"].rules,
+      ...(perfectionist.configs["recommended-natural"]?.rules || {}),
+      ...(vue.configs?.["recommended"]?.rules || {}),
+      ...(typescript.configs?.["recommended"]?.rules || {}),
 
 
       "perfectionist/sort-classes": "off",

packages/eslint-config-vue/package.json

@@ -16,7 +16,7 @@
     "reinit": "rimraf package-lock.json && rimraf node_modules && npm cache clean --force && npm i"
   },
   "peerDependencies": {
-    "eslint": ">=9.26.0"
+    "eslint": ">=9.31.0"
   },
   "dependencies": {
     "@stylistic/eslint-plugin": "5.2.2",