This release contains a few big improvements (mainly aria support and better
JS formatting) implemented by contributors. Thank you very much for the
support!

It took me a while to get back to SuperHTML and merge this work, sorry all
for the wait. Also for the PRs that remain open, sit tight, I'll get to them soon.

Changes:

• Added support for [role] and [aria-*] attributes (thanks bitterlox!) which
  includes also autocomplete support for the language server.
• Greatly improved JS formatting: JS code has now a proper tokenizer that
  avoids the previous issues with formatting code that makes non-trivial
  use of curly braces (thanks Jeffrey Crochet!).
• Relaxed rules for <iframe [allow]>: apparently nobody on the internet
  respects the grammar for values of this attribute (eg. when you copy
  embed code from youtube, it gives you completely wrong code), and since
  that grammar is a spec external to the HTML spec, I've made checking more
  lenient because it would otherwise be too hard for users to figure out
  the right syntax.
• Fix <svg>, <math>, <ins>, <del> categorization (previously you
  would get false positive nesting errors).
• Fixed incorrect analysis of comments inside of <details> elements which
  could cause false positive errors for a <summary> child.
• Fixed some minor bugs relative to the obsolete <script> double escape
  state. This should have no impact on anybody as it's a legacy feature.
• Fixed a rendering bug where formatting a file multiple times in a row
  could cause it to end up with 2 newlines at the bottom (instead of 1).