add support for `out` keyword #355

Job	Run time
build_linux (3.9)	2m 47s
build_linux (3.10)	3m 11s
build_linux (3.11)	2m 46s
build_linux (3.12)	2m 58s
build_windows (3.9)	18m 14s
build_windows (3.10)	29m 12s
build_windows (3.11)	23m 22s
build_windows (3.12)	23m 22s
test_linux (3.9, false, ubuntu-latest)	1m 11s
test_linux (3.10, false, ubuntu-latest)	1m 11s
test_linux (3.11, false, ubuntu-latest)	1m 14s
test_linux (3.12, false, ubuntu-latest)	1m 17s
test_windows (3.9, false, windows-2019)	3m 45s
test_windows (3.10, false, windows-2019)	5m 32s
test_windows (3.11, false, windows-2019)	4m 40s
test_windows (3.12, false, windows-2019)	5m 19s
	2h 10m 1s

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