add support for `out` keyword #327

Job	Run time
build_linux (3.9)	2m 24s
build_linux (3.10)	2m 31s
build_linux (3.11)	2m 33s
build_linux (3.12)	2m 20s
build_windows (3.9)	19m 15s
build_windows (3.10)	26m 3s
build_windows (3.11)	18m 19s
build_windows (3.12)	17m 5s
test_linux (3.9, false, ubuntu-latest)	1m 15s
test_linux (3.10, false, ubuntu-latest)	1m 15s
test_linux (3.11, false, ubuntu-latest)	1m 34s
test_linux (3.12, false, ubuntu-latest)	1m 5s
test_windows (3.9, false, windows-2019)	3m 48s
test_windows (3.10, false, windows-2019)	3m 45s
test_windows (3.11, false, windows-2019)	3m 44s
test_windows (3.12, false, windows-2019)	3m 36s
	1h 50m 32s

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