**New features**
* Added cache and primaryKeyCache parameters to the inverted index API.
* Added allow_retry query parameter, making it possible to retry fetching the latest batch from a cursor.
* Added OverloadControlDatabase, enabling the client to react effectively to potential server overloads.
* The db.version() now has a new optional parameter "details" that can be used to return additional information about the server version. The default is still false, so the old behavior is preserved.
* Added peak_memory_usage as a new property of AQL queries, available since ArangoDB 3.11.
* The explain method of AQL queries includes the "stats" field in the returned object. Note that the REST API returns it separately from the "plan" field, but for now we have to merge them together to ensure backward compatibility.
**DefaultHTTPClientChanges**
The following parameters where added:
- request_timeout: socket timeout in seconds for each individual connection
- pool_connections: the number of urllib3 connection pools to cache
- pool_maxsize: the maximum number of connections to save in the pool
- pool_timeout: if set, then the pool will be set to block=True, and requests will block for pool_timeout seconds and raise EmptyPoolError if no connection is available within the time period