[config] Revert update to short array syntax
[config] Revert update to short array syntax

* Preserves PHP 5.2 compatibility
bugsnag/bugsnag-laravel,browner12/bugsnag-laravel,bugsnag/bugsnag-laravel,bugsnag/bugsnag-laravel,bugsnag/bugsnag-laravel,browner12/bugsnag-laravel,browner12/bugsnag-laravel