Test: allow package version without patch level.

Remove unused '# type: ignore'

SPDX License - BSD-3-Clause

Pylint update.

Output (cosmetic).

Drop Python 3.10 support.

Minor updates.

Generalize list of supported python versions.

Add 'copy_back' script.

Update pylint.

Remove an unused import.

Cleanup test out dir shortening.

Cleanup.

Cleanup.

Rework 'local_devel_dependencies' feature.