build(pyproject.toml): drop support for python 3.9 (require 3.10+) #641
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Purpose:
In upgrading via #592 and #622, the new functionality for checking constructor docstrings fulfilled by the class docstring requires stable use of
__qualname__
for the Validator class.The problem:
This property is not supported in dataclasses in python3.9, but from 3.10 onward (solves #637).
Suggestion:
Drop support for Python3.9, which EOL is Oct 2025, so #622 can be validated and merged.