fix: upgrade redux from 4.0.5 to 4.2.1

Snyk has created this PR to upgrade redux from 4.0.5 to 4.2.1.

See this package in npm:
redux

See this project in Snyk:
https://app.snyk.io/org/yashtotale/project/2951855b-b5b6-4091-bfc0-f2eab0884148?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

website/package-lock.json

@@ -36,7 +36,7 @@
     "react-dom": "^17.0.1",
     "react-redux": "^7.2.1",
     "react-router-dom": "^5.2.0",
-    "redux": "^4.0.5",
+    "redux": "^4.2.1",
     "redux-persist": "^6.0.0",
     "redux-thunk": "^2.3.0"
   },