* Update changelogs for boost 1.2.0 beta

* Update projects/packages/autoloader/CHANGELOG.md

Co-authored-by: Jeremy Herve <jeremy@jeremy.hu>

* Maintain consistent heading levels in changelog

Co-authored-by: Jeremy Herve <jeremy@jeremy.hu>

* Consistent heading level for versions in readme

Co-authored-by: Jeremy Herve <jeremy@jeremy.hu>

* Consistent heading level for versions in readme

Co-authored-by: Jeremy Herve <jeremy@jeremy.hu>

* Release pre-1.0 changelogs with a link

* Use the correct version of composer when updating lockfiles

* Fix composer version in jetpack composer lockfile

* Clean out incorrect plugin-api-versions from composer.lock files due to wrong composer version

Co-authored-by: Mark George <thingalon@gmail.com>
Co-authored-by: Jeremy Herve <jeremy@jeremy.hu>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/1115593066