Update dependency socket.io-client to v2.5.0

Author: renovate[bot]

package.json

@@ -16,7 +16,7 @@
     "react-google-maps": "9.4.5",
     "react-modal-dialog": "4.0.7",
     "react-router": "5.0.1",
-    "socket.io-client": "2.2.0"
+    "socket.io-client": "2.5.0"
   },
   "scripts": {
     "start": "react-scripts start",