chore: bump lint to support optional chaining (#4905)

packages/vant-eslint-config/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vant/eslint-config",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "description": "eslint config of vant.",
   "main": "index.js",
   "publishConfig": {
@@ -14,9 +14,11 @@
   "dependencies": {
     "@typescript-eslint/eslint-plugin": "^2.3.3",
     "@typescript-eslint/parser": "^2.3.3",
-    "babel-eslint": "^10.0.2",
     "eslint-config-airbnb-base": "^14.0.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-vue": "^5.2.3"
+  },
+  "devDependencies": {
+    "eslint": "^6.6.0"
   }
 }