fix(deps): switch back to non-ESM packages

Node 18 has not the ability yet to run the more modern
packages. Since we want to keep Node 18 compatability
around for some time, these packages can't be upgraded.

Signed-off-by: Erik Michelson <github@erik.michelson.eu>

app.js

@@ -356,7 +356,7 @@ function handleTermSignals () {
   alreadyHandlingTermSignals = true
   realtime.maintenance = true
   // disconnect all socket.io clients
-  io.sockets.sockets.keys().forEach(function (key) {
+  Array.from(io.sockets.sockets.keys()).forEach(function (key) {
     const socket = io.sockets.sockets.get(key)
     if (!socket) return
     // notify client server going into maintenance status