docs(cli): changelog 3.4.0

package.json

@@ -66,7 +66,7 @@
     "vue": "^3.0.0"
   },
   "devDependencies": {
-    "@vant/cli": "^3.3.0",
+    "@vant/cli": "^3.4.0",
     "@vue/compiler-sfc": "3.0.5",
     "vue": "3.0.5",
     "prettier": "2.1.0"

packages/vant-cli/changelog.md

@@ -1,5 +1,11 @@
 # 更新日志
 
+## v3.4.0
+
+`2020-01-12`
+
+- 升级 `webpack-dev-server` 4.0.0-beta.0，修复 Hot Reload 不生效的问题
+
 ## v3.3.0
 
 `2021-01-09`