python-retrying-1.3.4-160000.2.2

- Switch package to modern Python Stack on SLE-15
  + Add %{?sle15_python_module_pythons}

- require setuptools

- Switch to pyproject macros.
- Stop using greedy globs in %files.

- Update to version 1.3.4
  * Added Greg Roodt as maintainer
  * Formatted code with black
  * Updated repository references

- Improve summary.

- Remove superfluous devel dependency for noarch package

- Remove duplicated license information from description.

- convert to singlespec

- update to version 1.3.3:
  - Add minimum six version of 1.7.0 since anything less will break
  things
- Add python-six as Requires

- update to 1.3.2:
  - Ensure we wrap the decorated functions to prevent information loss
  - Allow a jitter value to be passed in
  - Add requirements.txt to MANIFEST.in to fix pip installs
  - Add upstream six dependency, remove embedded six functionality
  - Add support for custom wait and stop functions

- Initial package