Missing fixes for version 3.0.0

Romainrequested to merge
romain-for-release into master

Description / Motivation

This MR contains miscellaneous fixes for the next release. It backports a patch from tezos/tezos, fixes the homepage in tezt.opam, and sets the version in the changelog.

How to Test the MR Manually

Check the CI. Ideally pin this package, remove tezt/{lib,lib_core,lib_js} from tezos/tezos and try to build tezos/tezos with this pin.

Checklist

  • Update CHANGES.md. No need to document changes to documentation and tests.
  • Make sure all new values, types etc. are documented in .mli files and that the generated documentation looks ok.
  • Add tests in test/, if relevant.

Merge request reports