Does not support <menu> tags

[abbott567]

Describe the bug

When using a <menu> tag with <li> children, ARC incorrectly flags it as an error.

See:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/menu

To Reproduce

1. Test against any menu element. For example:

<menu>
  <li><button id="save">Save for later</button></li>
  <li><button id="share">Share this news</button></li>
</menu>

2. Run ARC
3. Observe error:
   List item has no list parent
   Description: The <li> list item elements lack an appropriate <ol> (ordered list) or <ul> (unordered list) parent element.

Version information

• ARC Toolkit version: 5.6.0

[poorgeek]

Support for the <menu> tag as a valid parent is included with ARC Toolkit 5.7.2.