Pulsectl-asyncio

- Update supported pulsectl versions (new version 24.4.0 is supported as well)
- New methods `sink_default_get()` and `source_default_get()`, similar to those added in pulsectl (see https://github.com/mk-fg/python-pulse-control/issues/81)

- Fix and update pulsectl dependency version range
- previous version range was broken
- pulsectl 23.5.2 includes fix for 'channels' field in PA_SAMPLE_SPEC on big endian architectures (see https://github.com/mk-fg/python-pulse-control/issues/79)

- Update pulsectl dependency (only versions 23.5.0 and 23.5.1 are now supported)
- fixes support for big-endian machines when using the `subscribe_peak_sample()` and `get_peak_sample()` methods

This release (as compared to 0.2.3) only contains a small fix to make *pulsectl-asyncio* compatible with Python 3.11 and a small change to the packaging infrastructure. However, the package is now around for long enough that I consider it appropriate to declare it as "stable".

According to semantic versioning spec, future releases with non-backward compatible changes will be tagged with a new major version. In this case, I will try maintain the 1.x branch with bugfixes, if required, for at least some time.

Changes

* Use latest pulsectl release 22.3.2 for development and testing
* Change to declarative setuptools packaging configuration via `setup.cfg`
* Get rid of `inspect.getargspec()` for compatibility with Python 3.11
* Add Python 3.11 to ci test matrix

- Update pulsectl dependency version range
- *no changes affecting pulsectl-async*