Support optional hash output in save method #3060

Job	Run time
check_release	2m 2s
build (ubuntu-latest, 3.8)	7m 4s
build (ubuntu-latest, 3.11)	7m 12s
Make SDist	48s
build (windows-latest, 3.8)	12m 25s
build (windows-latest, 3.11)	12m 41s
Test Docs	1m 6s
build (macos-latest, 3.8)	5m 39s
Test Examples	42s
build (macos-latest, 3.11)	5m 45s
build (windows-latest, 3.9)	10m 18s
Test Lint	45s
Test Minimum Versions	5m 9s
build (ubuntu-latest, pypy-3.8)	13m 0s
build (macos-latest, 3.10)	5m 3s
Test Prereleases	4m 42s
Check Links	2m 57s
build (ubuntu-latest, 3.12)	6m 52s
integration_check (ubuntu-latest, 3.8)	2m 15s
integration_check (ubuntu-latest, 3.9)	2m 15s
integration_check_pypy	2m 45s
integration_check (ubuntu-latest, 3.10)	2m 18s
integration_check (ubuntu-latest, 3.11)	2m 26s
Install from SDist and Test	4m 41s
coverage	12s
tests_check	3s
	2h 1m 5s

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