Log Message:
php-composer: Update to 2.0.4

Upstream release notes:

- Fixed check-platform-req command not being clear on what packages are
  checked, and added a --lock flag to explicitly check the locked packages
- Fixed config & create-project adding of repositories to make sure they are
  prepended as order is much more important in Composer 2, also added a
  --append flag to config to restore the old behavior in the unlikely case
  this is needed
- Fixed curl downloader failing on old PHP releases or when using self-signed
  SSL certificates
- Fixed Bitbucket API authentication issue