Ensure connection is closed before deleting sqlite file

This should fix inability to drop sqlite DB on Windows OS

Author: ostrolucky

Command/DropDatabaseDoctrineCommand.php

@@ -104,6 +104,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             if ($shouldDropDatabase) {
                 if ($schemaManager instanceof SqliteSchemaManager) {
                     // dropDatabase() is deprecated for Sqlite
+                    $connection->close();
                     if (file_exists($name)) {
                         unlink($name);
                     }