refactor: update dependencies

Author: ruanyf

package.json

@@ -14,11 +14,6 @@
     "server": "loppo server",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
-  "husky": {
-    "hooks": {
-      "pre-push": "npm update"
-    }
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/wangdoc/javascript-tutorial.git"
@@ -35,9 +30,8 @@
   },
   "homepage": "https://github.com/wangdoc/javascript-tutorial",
   "dependencies": {
-    "gh-pages": "5.x",
-    "husky": "^4.3.8",
+    "gh-pages": "6.x",
     "loppo": "^0.6.24",
-    "loppo-theme-wangdoc": "^0.6.1"
+    "loppo-theme-wangdoc": "^0.7.1"
   }
 }