Flask-annex

What's Changed
Breaking
* `S3Annex` `list_keys` now returns a generator which transparently handles pagination. Previously a `tuple` was returned
* Drop support for python version < 10

Notes
* fix: use python3 cmd explicitly in setup.py by c0state in https://github.com/4Catalyzer/flask-annex/pull/61
* Chore/migrate GitHub actions tox GitHub fixes by matt-mclaughlin-quantum-si in https://github.com/4Catalyzer/flask-annex/pull/64
* chore: convert ci to github actions by c0state in https://github.com/4Catalyzer/flask-annex/pull/62
* Test fixes, improvements to list_keys and parameterization of S3Annex APIs by matt-mclaughlin-quantum-si in https://github.com/4Catalyzer/flask-annex/pull/63

New Contributors
* matt-mclaughlin-quantum-si made their first contribution in https://github.com/4Catalyzer/flask-annex/pull/64

**Full Changelog**: https://github.com/4Catalyzer/flask-annex/compare/v1.1.0...v2.0.0

- **Breaking:** Return a `post_data` sequence of entries rather than a `data` dictionary for S3 upload info to preserve ordering (49)
- **Breaking:** Drop Python 2 support (50)

- **Bugfix:** Fix Python 3.7 compatibility (46)

- **Bugfix:** Return a tuple from `list_keys` in `FileAnnex` for consistency with `S3Annex` (41)
- **Chore:** Fix package long description (42)

- **Bugfix:** Fix `delete_many` on S3 when no keys are specified (38)

- **Bugfix:** Include nested keys in `FileAnnex.list_keys` (37)