Bump version to 1.5.1 #1039

Job	Run time
docs	1m 50s
Rustfmt	5s
Rust unit tests (ubuntu-latest)	2m 58s
lint	1m 52s
Rust unit tests (macos-latest)	2m 15s
Rust unit tests (windows-latest)	4m 20s
typecheck	1m 13s
test (macos-latest, 3.9)	5m 11s
test (macos-latest, 3.10)	4m 28s
test (macos-latest, 3.11)	4m 33s
test (macos-latest, 3.12)	5m 27s
test (macos-latest, 3.13)	5m 30s
test (ubuntu-latest, 3.9)	6m 6s
test (ubuntu-latest, 3.10)	6m 50s
test (ubuntu-latest, 3.11)	6m 34s
test (ubuntu-latest, 3.12)	9m 12s
test (ubuntu-latest, 3.13)	9m 9s
test (windows-latest, 3.9)	8m 0s
test (windows-latest, 3.10)	10m 12s
test (windows-latest, 3.11)	11m 32s
test (windows-latest, 3.12)	12m 8s
test (windows-latest, 3.13)	11m 3s
	2h 10m 28s

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