Status: End of Life
As of August 2021, Hyperledger Composer is End of Life. None of the maintainers are actively developing new features. None of the maintainers are actively providing support via GitHub issues. However, if you wish to submit code changes via pull requests, these will be merged.
It is highly recommended that you use Hyperledger Fabric v1.4+ instead, which features significant improvements to the developer experience, including a new programming model.
More information available here: What’s new in Hyperledger Fabric v1.4