* Upgrade torch to v1.10.0
* Adapt torch version for torch-scatter in TableQA tutorial
* Add latest docstring and tutorial changes
* Make torch version more flexible
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* Make Tutorial10 use print instead of logs and fix a typo in Tutoria15
* Add a type check in 'print_answers'
* Add same checks to print_documents and print_questions
* Make RAGenerator return Answers instead of dictionaries
* Fix RAGenerator tests
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