Function Signature changes on Webform for composite elements

[DiegoPino]

What?

1. For Webform 5.4
   https://www.drupal.org/node/3045851 adds two new arguments to

protected function buildCompositeElementsTable();

So now its:

protected function buildCompositeElementsTable(array $form, FormStateInterface $form_state);

2. For Webform 5.4
   https://www.drupal.org/node/3052600
   Changes ::preCreate argument to be passed by reference

How?

1. Just in case, check we use this (i could not find any entries.. but hey, i'm human)
2. Totally needed. We are using this methods!