Python-arango

* Changed default request timeout from 5 to 60 seconds.
* Added `ArangoClient.close()` method to expose a way for users to close HTTP sessions.

* Fix broken logo in PyPI

* Added strict type hinting. Your code completion in IDEs should be even better now!
* Removed deprecated parameter `read_collections` from `Database.aql.execute`.
* Removed deprecated parameter `write_collections` from `Database.aql.execute`.
* Completely dropped support for Python 2.7 and Python 3.5.
* Renamed some internal classes.
* Moved from Travis CI to GitHub Actions.
* Added retries and timeout to the default HTTP client.
* VertexCollection and EdgeCollection now have access to more methods like `insert_many`, `import_bulk` (on parity with StandardCollection). **NOTE:** The newly exposed multi-document operations do not provide the same transactional guarantees and validations that single-document operations do.

* Properly handle foxx configuration and dependencies.
* Support modifying/deleting schemas ([example](https://python-driver-for-arangodb.readthedocs.io/en/master/schema.html)).

* Added support for ArangoDB version **3.7**.
* Added support for [schema validation](https://python-driver-for-arangodb.readthedocs.io/en/master/schema.html).
* Added [hot backup API](https://python-driver-for-arangodb.readthedocs.io/en/master/backup.html) (enterprise edition only).
* Added support for other API changes. See ArangoDB 3.7 REST API changelog for more information.
* Removed support for MMFiles.
* Removed support for Python 2.7.

* Added new Foxx management methods [db.foxx.update_service_with_file](https://python-driver-for-arangodb.readthedocs.io/en/master/specs.html#arango.foxx.Foxx.update_service_with_file) and [db.foxx.replace_service_with_file](https://python-driver-for-arangodb.readthedocs.io/en/master/specs.html#arango.foxx.Foxx.replace_service_with_file).
* Cursors now raise `CursorCountError` on statements like `len(cursor)` or `bool(cursor)` when count was never enabled (e.g. during AQL execution).