Construct Hub shows languages based on package.json even if they are not published

[alexpulver]

https://constructs.dev/packages/aws-bootstrap-kit/v/0.6.0?lang=python provides a command for installing the package in Python. But the package is not actually published to PyPI. The reason Construct Hub displays Python availability is because Python appears as a target in https://github.com/awslabs/aws-bootstrap-kit/blob/main/source/aws-bootstrap-kit/package.json#L14.

P.S.: The maintainer plans to publish the Python version soon, so this might not be reproducible once he does.