As of today, we have tooling in place that makes sure that our
main README.md **roughly** represents the state of the last release:
- browser versions and browser badges are those that we released last
- links to our API point to the last-released API version
This tooling, however, relies on the fact that every release is a sequence
of two consecutive commits:
- one commit that sets `package.json` version to a released version
- the following that "bumps" version to `-post`.
This release process is very unfortunate, because:
- it made releasing from branch impossible
- it required "freezing" commits to the master branch
This patch removes all the tooling and transitions `README.md` to always
represent tip-of-tree state. We will fully rely on
`https://playwright.dev` to show versioned docs.