Hi, I think #663 introduced a regression.
When I run php artisan backup:run, I get:
````
php artisan backup:run
Starting backup...
Dumping database xxxxxxxxxx...
Gzipping xxxxxxxxxxx...
Symfony\Component\Debug\Exception\FatalThrowableError : Call to undefined method Illuminate\Http\File::delete()
at /xxxxxxxx/vendor/spatie/laravel-backup/src/Tasks/Backup/BackupJob.php:240
236| if (config('backup.backup.gzip_database_dump')) {
237| consoleOutput()->info("Gzipping {$dbDumper->getDbName()}...");
238|
239| $compressedDumpPath = Gzip::compress($temporaryFilePath);
240| File::delete($temporaryFilePath);
241|
242| return $compressedDumpPath;
243| }
244|
Exception trace:
1 SpatieBackup\TasksBackupBackupJob::SpatieBackup\TasksBackup{closure}(Object(Spatie\DbDumper\Databases\MySql), "mysql")
[internal]:0
2 array_map(Object(Closure), [Object(Spatie\DbDumper\Databases\MySql)])
/xxxxxxxxxxxxxxxxx/vendor/laravel/framework/src/Illuminate/Support/Collection.php:911
````
We definitely need to get this merged. Our backups are currently broken while running the latest version of this package.
Trying to backup my database to s3 and am currently stuck because of this error.

Till this pull request is merged, I think its better to downgrade to "spatie/laravel-backup": "5.6.1", no longer getting this error.
Fix is merged.
Most helpful comment
We definitely need to get this merged. Our backups are currently broken while running the latest version of this package.