Build and test

Create release notes markdown output for `diff` command #1836

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Run time

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Job	Run time
test (ubuntu-latest, 3.9)	38m 18s
lint (3.9)	31s
test (ubuntu-latest, 3.10)	38m 20s
lint (3.10)	33s
test (windows-latest, 3.10)	44m 7s
	2h 1m 49s