set security config default to true

Author: LEAFERx

_config.yml

@@ -610,7 +610,7 @@ leancloud_visitors:
   app_id: #<app_id>
   app_key: #<app_key>
   # Dependencies: https://github.com/theme-next/hexo-leancloud-counter-security
-  security: false
+  security: true
 
 # Another tool to show number of visitors to each article.
 # visit https://console.firebase.google.com/u/0/ to get apiKey and projectId