Added timezones

app/Console/Commands/PopulateAirportTimezones.php

@@ -17,7 +17,7 @@ class PopulateAirportTimezones extends Command
      */
     public function handle()
     {
-        Airport::whereNull('timezone')->chunk(100, function ($airports) {
+        Airport::whereNull('timezone')->chunkById(100, function ($airports) {
             foreach ($airports as $airport) {
                 $zoneName = null;
                 $attempts = 0;