fix: upgrade postal-codes-js from 2.0.0 to 2.5.0

Snyk has created this PR to upgrade postal-codes-js from 2.0.0 to 2.5.0.

See this package in NPM:
https://www.npmjs.com/package/postal-codes-js

See this project in Snyk:
https://app.snyk.io/org/blockchain/project/2517bc9e-930d-436f-aae6-90d4bb4d260e?utm_source=github&utm_medium=upgrade-pr

packages/blockchain-wallet-v4-frontend/package.json

@@ -100,7 +100,7 @@
     "lodash.debounce": "4.0.8",
     "matchmedia-polyfill": "0.3.2",
     "moment": "2.27.0",
-    "postal-codes-js": "2.0.0",
+    "postal-codes-js": "2.5.0",
     "prop-types": "15.7.2",
     "qrcode.react": "0.9.3",
     "qs": "6.7.0",