* issue #146: fix pool hanging on pickle errors.
* issue #147: fix pool hanging when futures are cancelled
while large amount of data is being transferred.
- Adjust upstream source name in spec file
- Allow lower- and uppercase filenames for meta directory
- Switch build system from setuptools to pyproject.toml
* Add python-pip and python-wheel to BuildRequires
* Replace %python_build with %pyproject_wheel
* Replace %python_install with %pyproject_install
- Use Python 3.11 on SLE-15 by default
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-Pebble?expand=0&rev=36
