fix(MigrateDumpCommand): Workaround Mysql warning about GTIDs using --set-gtid-purged=OFF switch. (#17)

Author: paulrrogers

src/Commands/MigrateDumpCommand.php

@@ -238,7 +238,7 @@ private static function mysqlCommandPrefix(array $db_config) : string
         // Excluding any hash or date suffix since only current is relevant.
 
         return 'mysqldump --routines --skip-add-drop-table'
-            . ' --skip-add-locks --skip-comments --skip-set-charset --tz-utc'
+            . ' --skip-add-locks --skip-comments --skip-set-charset --tz-utc --set-gtid-purged=OFF'
             . ' --host=' . escapeshellarg($db_config['host'])
             . ' --port=' . escapeshellarg($db_config['port'])
             . ' --user=' . escapeshellarg($db_config['username'])