Bump mempool-js version to 2.2.1

frontend/package.json

@@ -55,7 +55,7 @@
     "@fortawesome/fontawesome-svg-core": "^1.2.35",
     "@fortawesome/free-solid-svg-icons": "^5.15.3",
     "@mempool/chartist": "^0.11.4",
-    "@mempool/mempool-js": "^2.2.0",
+    "@mempool/mempool-js": "^2.2.1",
     "@ng-bootstrap/ng-bootstrap": "^7.0.0",
     "@nguniversal/express-engine": "11.2.1",
     "@types/qrcode": "^1.3.4",