Add yield moment calculation #40

Job	Run time
type-checking	17s
docs-build	5m 7s
pre-commit	24s
tests 3.12 [ubuntu-latest]	1m 15s
tests 3.11 [ubuntu-latest]	1m 10s
tests 3.10 [ubuntu-latest]	1m 13s
tests 3.12 [windows-latest]	2m 25s
tests 3.11 [windows-latest]	1m 51s
tests 3.10 [windows-latest]	2m 15s
tests 3.12 [macos-latest]	1m 0s
tests 3.11 [macos-latest]	56s
tests 3.10 [macos-latest]	59s
tests 3.12 [macos-13]	4m 19s
tests 3.11 [macos-13]	2m 17s
tests 3.10 [macos-13]	1m 52s
tests-extended 3.12 [ubuntu-latest]	1m 11s
coverage	14s
	28m 45s

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