Drop Python 3.8, add 3.13 #1378

Job	Run time
build-lint-test (3.9, ubuntu-latest)	6h 0m 14s
build-lint-test (3.9, ubuntu-arm)	6h 0m 13s
build-lint-test (3.9, macos-intel)	7m 57s
build-lint-test (3.9, macos-arm)	4m 38s
build-lint-test (3.9, windows-latest)	19m 29s
build-lint-test (3.13, ubuntu-latest)	10m 46s
build-lint-test (3.13, ubuntu-arm)	9m 6s
build-lint-test (3.13, macos-intel)	15m 12s
build-lint-test (3.13, macos-arm)	6m 6s
build-lint-test (3.13, windows-latest)	17m 58s
features-tests / test	5m 55s
	13h 37m 34s

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