Tests

added minor type hinting #721

Job	Run time
Linux / Python 3.9 / tox -e security	25s
Linux / Python 3.10 / tox -e security	26s
Linux / Python 3.11 / tox -e security	23s
Linux / Python 3.10 / tox -e lint	33s
Linux / Python 3.9 / tox -e type-checking	33s
Linux / Python 3.10 / tox -e type-checking	32s
Linux / Python 3.11 / tox -e type-checking	30s
Linux / Python 3.9 / tox -e py39	34s
Linux / Python 3.9 / tox -e py39-no-ext	33s
Linux / Python 3.10 / tox -e py310	36s
Linux / Python 3.10 / tox -e py310-no-ext	35s
Linux / Python 3.11 / tox -e py311	35s
Linux / Python 3.12 / tox -e py312	34s
Linux / Python 3.12 / tox -e py312-no-ext	34s
Linux / Python 3.13 / tox -e py313	35s
Linux / Python 3.13 / tox -e py313-no-ext	33s
Windows / Python 3.9 / tox -e py39-no-ext	33s
Windows / Python 3.10 / tox -e py310-no-ext	39s
Windows / Python 3.11 / tox -e py311-no-ext	32s
	10m 15s

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