feat: support dangerouslySetInnerHTML on Fragments

[marvinhagemeister]

This PR adds support for using dangerouslySetInnerHTML on Fragments. It allows you to inject unsafe raw HTML without needing a wrapping element which is often undesired when working with CSS grid or flexbox. I've opted to insert surrounding comments here as well, so that we could in theory hydrate it and support the same feature client-side.

Before:

<article>
  <h1>{post.title}</h1>
  <div dangerouslySetInnerHTML={{__html: post.content }} />
</article>

After:

<article>
  <h1>{post.title}</h1>
  <Fragment dangerouslySetInnerHTML={{__html: post.content }} />
</article>

This superseeds: #418

[changeset-bot]

🦋 Changeset detected

Latest commit: 5a5e83f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
preact-render-to-string	Minor

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