reafctor dependencies

packages/hackmd/package.json

@@ -1,16 +1,16 @@
 {
   "name": "@growi/hackmd",
   "version": "6.0.0-RC.1",
-  "description": "GROWI js files to use hackmd",
+  "description": "GROWI js and css files to use hackmd",
   "license": "MIT",
   "scripts": {
     "build": "vite build"
   },
   "dependencies": {
-    "throttle-debounce": "^3.0.1"
   },
   "devDependencies": {
     "penpal": "^4.0.0",
+    "throttle-debounce": "^3.0.1",
     "vite": "^3.1.0"
   }
 }