$ composer --version Composer version 2.1.8 2021-09-15 13:55:14
Last updated in https://gitlab.wikimedia.org/repos/releng/dev-images/-/commit/5969444e811705523c18d287fbf7e13c8b008ff2
From the mediawiki-vendor readme:
- Ensure you're using the latest version of 2.3.x of composer via composer --version. This keeps installed.json alpha-sorted, making patches less likely to conflict, and diffs easier to read.