Support for Hugging Face Question Answering Models

[Veluchs]

Feature request

Support for Hugging Face's Question Answering Models would be great.

Motivation

It would allow for the construction of extractive Question Answering Pipelines, making use of the vast amount of open Q&A Models on Hugging Face.

Your contribution

I would be happy to tackle the implementation and submitt a PR. Have you thought about integrating this already? If so, I'm open for a discussion on the best way to to this. (New Class vs extending 'HuggingFacePipeline').