chore: setup eslint for prohibited syntax (#8516)

.eslintrc

@@ -1,4 +1,20 @@
 {
   "root": true,
-  "extends": ["@vant"]
+  "extends": ["@vant"],
+  "overrides": [
+    {
+      "files": ["src/**/*"],
+      "excludedFiles": ["**/test/*", "**/demo/*"],
+      "rules": {
+        "prefer-object-spread": "off",
+        // since we target ES2015 for baseline support, we need to forbid object
+        // rest spread usage (both assign and destructure)
+        "no-restricted-syntax": [
+          "error",
+          "ObjectExpression > SpreadElement",
+          "ObjectPattern > RestElement"
+        ]
+      }
+    }
+  ]
 }

packages/vant-eslint-config/index.js

@@ -69,7 +69,7 @@ module.exports = {
   overrides: [
     {
       files: ['*.vue'],
-      parser: require.resolve('vue-eslint-parser')
+      parser: require.resolve('vue-eslint-parser'),
     },
     {
       files: ['**/*.md/*.js', '**/*.md/*.ts'],