Release 2.3.2 - tested on PHP 8.2 and 8.3

• psalm version 5 is used for static analysis, fixed new-found issues
• JS generated by Length rule now checks whether an element's value itself is empty, not its length property
• Added missing getter methods for existing setters:
  • \HTML_QuickForm2_Element_Button::getContent()
  • \HTML_QuickForm2_Element_Static::getTagName()