Move preact to peerDependencies

[avaly]

This gives control over the version of preact to the parent project which uses this project.

Otherwise, if the main project is using preact version 8+, then a bundle would contain both the preact 8+ from the main project and the preact 7.1.0 from this project.

Note: Fixing the preact-render-to-string to 3.5.0, because 3.6.0 introduced some changes to who self closing tags are rendered and tests began failing.

[avaly]

I've also upgraded preact-side-effect with the latest version, which contains a similar move of preact to peerDependencies: ooade/preact-side-effect#7

[avaly]

@Download, @ooade can you also publish a new version to npm?

[ooade]

@avaly V4 alpha 3 released

[avaly]

@Download, @ooade ⬆️ that version didn't get published to npm.

[ooade]

@avaly i guess so 😅
Waiting on @Download for this

[Download]

@ooade I added you to the NPM collaborators so you should be able to publish now.
Let me know if you have any issues. 👍

EDIT: It is possible to delete GitHub releases, but probably the easiest thing to do is just to go to version 4.0.0-alpha-4 and skip alpha-3.

[ooade]

@Download Thanks
@avaly Done :)

[Download]

@avaly Thanks for your contribution! 👍 You deserve a medal! 🥇 😉
@ooade Thank you for merging and releasing it! . ❤️

On another note. I guess this contribution is the result of you using preact-helmet in your project. So maybe you can provide some feedback on whether you think it is ready for v4.0.0-Final?