fix: upgrade webpack-dev-server from 5.0.3 to 5.0.4 (#334)

Snyk has created this PR to upgrade webpack-dev-server from 5.0.3 to 5.0.4.

See this package in npm:
webpack-dev-server

See this project in Snyk:
https://app.snyk.io/org/loonz206/project/e82dae86-fb5a-4723-802c-cca6ee0bb838?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

package.json

@@ -70,6 +70,6 @@
     "style-loader": "^3.3.4",
     "webpack": "^5.94.0",
     "webpack-cli": "^4.10.0",
-    "webpack-dev-server": "^5.0.0"
+    "webpack-dev-server": "^5.0.4"
   }
 }