Pytest-assert-utils

Added
- Add support for Python 3.11

Removed
- Removed support for Python 3.6 (mostly due to poor `typing.Generic` support) — see [GH3](https://github.com/theY4Kman/pytest-assert-utils/issues/3)

Added
- Added `containing_only` and `containing_exactly` methods to `util.Collection` classes — see [GH1](https://github.com/theY4Kman/pytest-assert-utils/pull/1) (thanks, [sjhewitt](https://github.com/sjhewitt))
- Added `util.Model` class to check attrs of objects using an equality comparison — see [GH2](https://github.com/theY4Kman/pytest-assert-utils/pull/2) (thanks, [sjhewitt](https://github.com/sjhewitt))
- Added tests for `util.Collection` classes

Fixed
- Add support for Python 3.10

Added
- Add documentation to README
- Transfer ownership to theY4Kman

Added
- Allow `util.Collection` classes to be used directly in comparisons
- Add `util.Dict` and `util.Str` comparison classes

Fixed
- Added setuptools entrypoint, so pytest will perform assertion rewriting