update theme to butterfly

themes/butterfly/package.json

@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-butterfly",
-  "version": "5.5.1",
+  "version": "5.5.3",
   "description": "A Simple and Card UI Design theme for Hexo",
   "main": "package.json",
   "scripts": {
@@ -25,7 +25,7 @@
   "dependencies": {
     "hexo-renderer-pug": "^3.0.0",
     "hexo-renderer-stylus": "^3.0.1",
-    "hexo-util": "^3.3.0",
+    "hexo-util": "^4.0.0",
     "moment-timezone": "^0.6.0"
   },
   "homepage": "https://butterfly.js.org/",