Domify

Changed
- Bump the minimum Python version to 3.8.

HTML spec
- Add the `autocorrect`, `writingsuggestions`, `onbeforeinput`, `onpagereveal` and
`onpageswap` global attributes.
- Add the empty string value to the `spellcheck` global attribute.
- Add the `shadowrootclonable` and `shadowrootserializable` attributes to the `template`
element.

HTML spec
- Add the `name` attribute to the `details` element.
- Add the `shadowrootmode` and `shadowrootdelegatesfocus` to the `template` element.
- Add the `onpagereveal` attribute to the `body` element.

HTML spec
- Remove the incorrect attributes `height`, `media` and `width` attributes from
`picture` elements.

HTML spec
- Add the `fetchpriority` attribute to the `img`, `link` and `script` elements.
- Add the `plaintext-only` value to the `contenteditable` global attribute.
- Add the `search` element.
- Replace the `popoverhidetarget`, `popovershowtarget` and `popovertoggletarget`
attributes of the `button` and `input` elements with `popovertarget` and
`popovertargetaction`.

HTML spec
- Add the `popover` and `onbeforetoggle` global attributes.
- Add the `popoverhidetarget`, `popovershowtarget` and `popovertoggletarget` attributes
to `button` and `input` elements.
- Add the `dir` attribute to `bdo` elements.
- Add the `height` attribute to `picture` elements.

Added
- Explicitly support Python 3.11.
Changed
- Bump the minimum Python version from 3.7.0 to 3.7.2.
HTML spec
- Add the `onscrollend` global attribute.
- Update the allowed values of the `hidden` global attribute.