Upgrade socket.io (#4526)

* Upgrade socket.io, drop support with v2 clients

* tsc

package.json

@@ -204,9 +204,9 @@
     "slug": "^5.3.0",
     "slugify": "^1.6.5",
     "smooth-scroll-into-view-if-needed": "^1.1.32",
-    "socket.io": "^3.1.2",
-    "socket.io-client": "^3.1.3",
-    "socket.io-redis": "^6.1.0",
+    "socket.io": "^4.5.4",
+    "socket.io-client": "^4.5.4",
+    "socket.io-redis": "^6.1.1",
     "stoppable": "^1.1.0",
     "string-replace-to-array": "^2.1.0",
     "styled-components": "^5.2.3",