bookmark-manager-react-web-app-project fixed to reduce vulnerabilities (#93)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NODENOTIFIER-1035794

Author: snyk-bot

bookmark-manager-react-web-app-project/package.json

@@ -8,7 +8,7 @@
     "@testing-library/user-event": "^7.1.2",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
-    "react-scripts": "3.4.3"
+    "react-scripts": "4.0.0"
   },
   "scripts": {
     "start": "react-scripts start",