Pytest-cases

- Fixed `FrozenInstanceError` when using `pytest 7.0.0`. Fixed [251](https://github.com/smarie/python-pytest-cases/issues/251). [PR#253](https://github.com/smarie/python-pytest-cases/pull/253) by [jammer87](https://github.com/jammer87)

- Suppressed warnings in our own tests, to improve packaging maintenance. Fixed [248](https://github.com/smarie/python-pytest-cases/issues/248)
- Fixed bug where setting `ids` in `parametrize` without setting explicitly `idgen=None` would raise a `ValueError`. Fixed [238](https://github.com/smarie/python-pytest-cases/issues/238).
- Fixed bug where case-holding class marks were not propagated to static methods and class methods. Fixed [246](https://github.com/smarie/python-pytest-cases/issues/246)
- Fixed support for multiprocessing `Pool`. Fixes [242](https://github.com/smarie/python-pytest-cases/issues/242)

- Improved error message when a case function nested in a class has no `self` argument and is not static. Fixes [243](https://github.com/smarie/python-pytest-cases/issues/243)
- Added support for the new Scopes enum in pytest 7. Fixed [241](https://github.com/smarie/python-pytest-cases/issues/241)
- Fixed `__version__` in development mode.

- Restructured project so that tests are truly independent, to ease rpm/apt/etc. packaging. Fixed [220](https://github.com/smarie/python-pytest-cases/issues/220).

- Fixed an issue where using keyword `argnames` in `pytest.mark.parametrize` would cause `IndexError: tuple index out of range` in the tests collection phase. Fixed [234](https://github.com/smarie/python-pytest-cases/issues/234).

- A case id can now be a reserved keyword without triggering any `SyntaxError`, even if the case is transformed into a fixture. Fixes [230](https://github.com/smarie/python-pytest-cases/issues/230)