Add missing boolean attributes

[pepelsbey]

These are boolean attributes, as referenced in the spec:

• nomodule
• playsinline

Otherwise, they won’t collapse, as rendered by online version:

<script nomodule="nomodule"></script>
<video playsinline="playsinline">
<input disabled="disabled">

<script nomodule=nomodule></script>
<video playsinline=playsinline>
<input disabled>

[otomad]

Please add attributes:

• crossorigin
• referrerpolicy

Unlike other attributes, if the value of these attributes is empty string, then the value can be omitted and show only the attribute name.

Example:

<script crossorigin="" referrerpolicy=""></script>

Expected to be:

<script crossorigin referrerpolicy></script>