My current version is 0.1.0-beta13 and I've disabled and uninstalled all third-party extensions. But I still got the 'Nothing to install or update' message:
[~/public_html]$ composer update --prefer-dist --no-dev -a --with-all-dependencies
Loading composer repositories with package information
Updating dependencies
Nothing to install or update
Generating optimized autoload files
Carbon 1 is deprecated, see how to migrate to Carbon 2.
https://carbon.nesbot.com/docs/#api-carbon-2
You can run './vendor/bin/upgrade-carbon' to get help in updating carbon and other frameworks and libraries that depend on it.