Drop Python 3.8, add 3.13 #1406

Job	Run time
build-lint-test (3.9, ubuntu-latest)	11m 44s
build-lint-test (3.9, ubuntu-arm)	8m 7s
build-lint-test (3.9, macos-intel)	11m 55s
build-lint-test (3.9, macos-arm)	4m 51s
build-lint-test (3.9, windows-latest)	12m 25s
build-lint-test (3.13, ubuntu-latest)	10m 57s
build-lint-test (3.13, ubuntu-arm)	8m 27s
build-lint-test (3.13, macos-intel)	11m 16s
build-lint-test (3.13, macos-arm)	5m 58s
build-lint-test (3.13, windows-latest)	13m 45s
features-tests / test	6m 5s
	1h 45m 30s

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