Patch en cas de config sans clé 'roles'

src/BjyAuthorize/Guard/AbstractGuard.php

@@ -63,7 +63,7 @@ abstract class AbstractGuard extends AbstractListenerAggregate implements
         $rules = [];
 
         foreach ($this->config as $rule) {
-            $rule['roles']  = (array) $rule['roles'];
+            $rule['roles']  = isset($rule['roles']) ? (array) $rule['roles'] : array();
             $rule['action'] = isset($rule['action']) ? (array) $rule['action'] : array(null);
 
             foreach ($this->extractResourcesFromRule($rule) as $resource) {