- Add support for Python 3.12: use assertRaisesRegex instead of asser…

…tRaisesRegexp

- Test infrastructure improvements

- Update Python compatibility markers

- Update test, linting, and release management infrastructure

- Update Python compatibility markers

-  Update test, documentation, and release infrastructure
   (fixup for v1.0.1)

- Update Python compatibility markers

- Update test and documentation infrastructure

- Add contains_key, an alias for has_key

- Document PicklingError for ensure_annotations in multiprocessing (#32)

- Package is stable

- Fix version range compat error with collections.abc

- Import ABCs from collections.abc. Fixes #27.

- Return type of the incorrect value in EnsureError (#28)

- Move implmentation into submodule to clean up namespace