Switch basichtml with linkedom

[Kal-Aster]

basicHTML became deprecated, recommending linkedom as alternative.
This PR does this switch.

[GianlucaGuarini]

That's a good patch, it needs some work though. I would prefer cleaning up the globals once the [dispose]
(https://github.com/riot/ssr/blob/main/src/index.js#L50-L55) function gets called. I think we can create and destroy them in the render function avoiding polluting the global scope.

[Kal-Aster]

I can do this

[Kal-Aster]

BTW in my project I found myself needing the createRenderer function for a custom render flow and I found that it is not exported.

Do you think that it's a good idea exporting it, for the sake of extendability?
Can I do it in this PR or should I open a new one?

[GianlucaGuarini]

That's a good Idea but I would rather create a separate PR for it

[GianlucaGuarini]

thank you I will release the new major release together with Riot.js 6

[Kal-Aster]

Wow, Riot.js 6? I haven't seen any news about it, is there any expected release date?

However thank you, I'll PR for exporting createRenderer.