[BUG] [haskell-http-client]: Cannot create HTTP client for Docker

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

openapi-generator successfully generates HTTP client for Docker, but I can't compile it using stack haddock. It ends with this error:

[ 6 of 26] Compiling DockerEngine.Model ( lib/DockerEngine/Model.hs, .stack-work/dist/x86_64-linux-tinfo6/Cabal-2.4.0.1/build/DockerEngine/Model.o )

/home/egorcod/Документы/openapi-docker/lib/DockerEngine/Model.hs:6391:51: error:
    Not in scope: type constructor or class ‘Array’
    Perhaps you meant ‘A.Array’ (imported from Data.Aeson)
    Perhaps you want to add ‘Array’ to the import list in the import of
    ‘Data.Aeson’ (lib/DockerEngine/Model.hs:34:1-41).
     |
6391 |   , systemDataUsageResponseContainers :: !(Maybe [Array]) -- ^ "Containers"
     |

openapi-generator version

> docker run --rm openapitools/openapi-generator-cli version
4.0.0-SNAPSHOT

OpenAPI declaration file content or url

https://docs.docker.com/engine/api/v1.39/swagger.yaml

Command line used for generation

docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate -i https://docs.docker.com/engine/api/v1.39/swagger.yaml -g haskell-http-client -o /local

Steps to reproduce

> mkdir openapi-docker
> cd openapi-docker
> docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate -i https://docs.docker.com/engine/api/v1.39/swagger.yaml -g haskell-http-client -o /local
> stack haddock

Related issues/PRs

Not found any.

Suggest a fix

Perhaps you meant ‘A.Array’ (imported from Data.Aeson)
Perhaps you want to add ‘Array’ to the import list in the import of
    ‘Data.Aeson’ (lib/DockerEngine/Model.hs:34:1-41).

Generate the Docker API client with the provided openapi-generator command, then run stack haddock to reproduce the failure. Inspect lib/DockerEngine/Model.hs and its Data.Aeson import around the reported Array reference; done means the generated Haskell client builds successfully.