Bump composer/composer from 1.8.6 to 1.9.0
Bump composer/composer from 1.8.6 to 1.9.0

Bumps [composer/composer](https://github.com/composer/composer) from 1.8.6 to 1.9.0.
- [Release notes](https://github.com/composer/composer/releases)
- [Changelog](https://github.com/composer/composer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/composer/composer/compare/1.8.6...1.9.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
php-api-clients/installer