Merge #501

501: Fix typing of Index.get_documents r=alallema a=sapristi



# Pull Request

## What does this PR do?

Fix typing of `Index.get_documents`
 
Fixes #500 


## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!


Co-authored-by: mmill <[email protected]>

Author: bors[bot]

meilisearch/index.py

@@ -277,7 +277,7 @@ def get_document(self, document_id: str, parameters: Optional[Dict[str, Any]] =
             f'{self.config.paths.index}/{self.uid}/{self.config.paths.document}/{document_id}?{parse.urlencode(parameters)}'
         )
 
-    def get_documents(self, parameters: Optional[Dict[str, Any]] = None) -> List[Dict[str, Any]]:
+    def get_documents(self, parameters: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
         """Get a set of documents from the index.
 
         Parameters