Fix for migration rollback command

[gnkz]

The problem

The php artisan doctrine:migrations:rollback doesn't work. When executed without arguments it throws InvalidArgumentException: The "version" argument does not exist.. When executed with an argument it throws [RuntimeException]: Too many arguments.

The fix

Updated the $signature property of LaravelDoctrine\Migrations\Console\RollbackCommand from:

protected $signature = 'doctrine:migrations:rollback [version=]
    {--connection= : For a specific connection.}';

To:

protected $signature = 'doctrine:migrations:rollback
    {--migration-version= : For a specific migration version.}
    {--connection= : For a specific connection.}';

Also updated the line 36 from:

$version = $this->argument('version') ?: $configuration->getCurrentVersion();

to:

$version = $this->option('migration-version') ?: $configuration->getCurrentVersion();

With these changes the command accepts no argument and the rollback is executed to the latest version. When the --migration-version option is passed, the rollback is executed to that specific migration version.

[patrickbrouwers]

Thanks for sending in the PR. However I have fixed the problem instead of replacing the solution. No idea why this worked in the past to be honest. Should work again now as stated in the docs.