Python-arango

- Remove setuptools_scm from depedency and switch back to manual versioning
- Bump up versions of some other dependencies
- Drop official support for Python 3.6 (should still work for now)

What's Changed
* adjusts workflow to accommodate drafts by cw00dw0rd in https://github.com/ArangoDB-Community/python-arango/pull/186
* new: fallback host support for 503 errorNum by aMahanna in https://github.com/ArangoDB-Community/python-arango/pull/189
* Update copyright year. by joerg84 in https://github.com/ArangoDB-Community/python-arango/pull/190
* Update http.rst by cw00dw0rd in https://github.com/ArangoDB-Community/python-arango/pull/191
* Configure collection properties: add support for replicationFactor + writeConcern by maxkernbach in https://github.com/ArangoDB-Community/python-arango/pull/193

New Contributors
* cw00dw0rd made their first contribution in https://github.com/ArangoDB-Community/python-arango/pull/186
* maxkernbach made their first contribution in https://github.com/ArangoDB-Community/python-arango/pull/193

**Full Changelog**: https://github.com/ArangoDB-Community/python-arango/compare/7.3.0...7.3.1

What's Changed
* improve performance of `get_many` by jsteemann in https://github.com/ArangoDB-Community/python-arango/pull/177
* Attempt to fix CI by joerg84 in https://github.com/ArangoDB-Community/python-arango/pull/183
* Updated repository in setup.py. by joerg84 in https://github.com/ArangoDB-Community/python-arango/pull/181
* Added query option for disabled fillBlockCache. by joerg84 in https://github.com/ArangoDB-Community/python-arango/pull/182
* feature: host fallback support by aMahanna in https://github.com/ArangoDB-Community/python-arango/pull/184

New Contributors
* jsteemann made their first contribution in https://github.com/ArangoDB-Community/python-arango/pull/177
* joerg84 made their first contribution in https://github.com/ArangoDB-Community/python-arango/pull/183
* aMahanna made their first contribution in https://github.com/ArangoDB-Community/python-arango/pull/184

**Full Changelog**: https://github.com/ArangoDB-Community/python-arango/compare/7.2.0...7.3.0

* Add `bind_vars` parameter to `AQL.explain` method.

* 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