* recency reranker code
* removed
* readd
* edited code
* edit
* mypy test fix
* adding warnings for score method
* fix
* fix
* adding paper link
* comments implementation
* change to predict and predict_batch
* change to predict and predict_batch 2
* adding unit test
* fixes
* small fixes
* fix for unit test
* table driven test
* small fixes
* small fixes2
* adding predict_batch tests
* add recentness_ranker to api reference docs
* implementing feedback
* implementing feedback2
* implementing feedback3
* implementing feedback4
* implementing feedback5
* remove document_map, remove final check if score is not None
* add final check if doc score is not None for mypy
---------
Co-authored-by: Darja Fokina <daria.f93@gmail.com>
Co-authored-by: Julian Risch <julian.risch@deepset.ai>
* Adding embed_meta_fields to ranker nodes
* Fix tests by adding case where embed_meta_fields=None
* Adding unit test for _add_meta_fields_to_docs
* Fix pylint
* Add unit test
* Added another unit test. Caught a bug.
* Adding more unit tests
* Add unit test
* Updating some older tests into unit tests using mocking
* Convert another test to unit test
* Test run method
* One last unit test
* adding unit tests for sentence transformers ranker
* Adding more unit tests
* Remove empty line
* Undo static method
* Revert change
* Updated indentation and added match message
* Remove unneeded paranthesis
