Update project roadmap

[andrewslotin]

The current roadmap has been created in Apr'22 and since then the project has advanced quite significantly. Proposed changes are reflecting current project state and the ongoing development.

[CLAassistant]

All committers have signed the CLA.

[inancgumus]

In this paragraph, it says:

Note that async/await is still under development and is not supported in k6 scripts. If you wish to use this syntax you'll have to transform your script beforehand with an updated Babel version. See the k6-template-es6 project and this comment for details.

As I explained in this comment, Mihail has a new (probably experimental) PR that makes this switch (enabling babel translation). So we can hopefully use async/await. So we might consider updating the paragraph after experimenting with the new PR.

[inancgumus]

Excellent work, @andrewslotin 👏 It was time to do this; Thanks for taking the time to update the document 🙇 I've added some suggestions and questions.

Note: My other comment that is not part of this review is here.

[ankur22]

@ankur22 I wonder how would that work since k6 will use k6-browser (after the nearing merge)? I mean, k6-browser will be available for all cloud users, won't it? Although, we can find ways to tweak this behavior, like, not releasing it to some users.

I don't know the time frame for the merge, but we should plan to get it out to some select customers if the merge won't take place within the next 3 months.