chore: refactor main code into smaller parts

lib/readyHandler.js

@@ -22,6 +22,14 @@ function onConnect (client) {
   }
 }
 
+function sendOfflineQueue (client) {
+  while (client.offlineQueue.length) {
+    const command = client.offlineQueue.shift()
+    debug('Sending offline command: %s', command.command)
+    client.internalSendCommand(command)
+  }
+}
+
 function onReady (client) {
   debug('onReady called %s id %s', client.address, client.connectionId)
   client.ready = true
@@ -83,7 +91,7 @@ function onReady (client) {
       }
     }
   }
-  client.sendOfflineQueue()
+  sendOfflineQueue(client)
   client.emit('ready')
 }