chore: 更新配置

Author: xudaolong

docs/.vuepress/config.js

@@ -67,7 +67,10 @@ module.exports = {
     '@vuepress-reco/extract-code',
     'flowchart',
     ['sitemap', {
-      hostname: 'https://codeexpander.com'
+      hostname: 'https://codeexpander.com',
+      dateFormatter: val => {
+        return new Date().toISOString()
+      }
     }],
     ['@vuepress-reco/rss', {
       site_url: 'https://codeexpander.com',

package.json

@@ -19,7 +19,7 @@
     "vuepress": "^1.2.0",
     "vuepress-plugin-flowchart": "1.4.3",
     "vuepress-plugin-img-lazy": "^1.0.2",
-    "vuepress-plugin-sitemap": "2.3.0",
+    "vuepress-plugin-sitemap": "^2.3.1",
     "vuepress-theme-reco": "1.2.1",
     "whatwg-fetch": "3.0.0"
   },