Apologies

* Bump up to final v3 version of shared workflows.
* Add new hidden 'run dch' command to generate new Changelog entry.
* Add NOTICE file to sdist, alongside existing LICENSE file.

* Adjust GHA build to run MacOS and Windows tests only on latest Python.
* Automate the existing manual release process using GitHub Actions.
* Pull in updates from run-sync-framework to reflect new process.

* Pull in updates from run-sync-framework.

* Refactor the run script and pre-commit hooks to reduce duplication.
* Rework the GitHub Actions build process to pull out shared code.

* Upgrade to Poetry v1.2.0 and make related build process changes.
* Upgrade to Pylint v2.15.0 and make related changes to configuration
* Fix Pylint's configured class-attribute-naming-style to be snake_case.
* Adjust Black configuration to target Python 3.7, 3.8, 3.9, and 3.10.
* Add dependency caching to GitHub Actions workflow.
* Fix the GitHub Actions matrix build to properly target Windows and MacOS.
* Make improvements to the curses-based demo and test it in the tox suite.
* Address annoying PyUnresolvedReferences warnings in PyCharm.

* Modernize usage of attrs library.