[#61] fix bug on settings page

The array passed to $this->addEntityRef() was incorrectly structured

CRM/Twingle/Form/Settings.php

@@ -93,8 +93,12 @@ class CRM_Twingle_Form_Settings extends CRM_Core_Form {
       'twingle_protect_recurring_activity_assignee',
       E::ts('Assigned To'),
       [
+        'api' => [
+          'params' => [
             'contact_type' => ['IN' => ['Individual', 'Organization']],
             'check_permissions' => 0,
+          ],
+        ],
       ]
     );