Release notes for 19.3.0 #10326

Job	Run time
build (ubuntu-latest)	1m 25s
testing (windows-latest, 3.10, 18.x, 1)	5m 24s
build (windows-latest)	3m 8s
testing (windows-latest, 3.12, 20.x, 2)	5m 4s
testing (ubuntu-latest, 3.10, 22.x, 3)	2m 59s
testing (ubuntu-latest, 3.11, 20.x, 4)	1m 54s
testing (windows-latest, 3.9, 20.x, 1)	5m 34s
testing (ubuntu-latest, 3.10, 18.x, 2)	2m 36s
testing (ubuntu-latest, 3.9, 18.x, 3)	3m 5s
testing (ubuntu-latest, 3.10, 20.x, 4)	1m 52s
testing (ubuntu-latest, 3.11, 20.x, 1)	5m 28s
testing (macos-latest, 3.11, 20.x, 1)	4m 36s
testing (macos-latest, 3.12, 20.x, 2)	2m 14s
testing (macos-latest, 3.10, 20.x, 3)	3m 13s
test-install (windows-latest, 3.11, 18.x)	8m 2s
test-install (ubuntu-latest, 3.9, 18.x)	5m 8s
test-install (ubuntu-latest, 3.11, 18.x)	5m 5s
test-install (ubuntu-latest, 3.11, 20.x)	5m 12s
	1h 11m 59s

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