Multiple option is now supported.

$app->opt('--email {EMAIL}')
    ->multiple();

Option callback

The second argument of option() is a callback when option is supplied.

$app->opt('--hello {NAME}', function ($context, $value) {
   ...
});

DebugMiddleware

Call Debug::enable(). Required symfony/debug

$app->add(\Clim\Middleware\DebugMiddleware::class);