feat: use unofficial builds in SEA (#126) #248

Job	Run time
build (18.x, ubuntu-latest)	33s
build (18.x, windows-latest)	2m 1s
build (18.x, macos-latest)	30s
build (20.x, ubuntu-latest)	21s
build (20.x, windows-latest)	2m 10s
build (20.x, macos-latest)	29s
test_18 / test (18.x, ubuntu-latest)	3m 19s
test_20 / test (18.x, ubuntu-latest)	3m 8s
test_18 / test (18.x, windows-latest)	5m 11s
test_20 / test (18.x, windows-latest)	6m 22s
test_18 / test (18.x, macos-latest)	3m 4s
test_20 / test (18.x, macos-latest)	3m 5s
test_18 / test (20.x, ubuntu-latest)	3m 4s
test_20 / test (20.x, ubuntu-latest)	2m 55s
test_host / test (18.x, ubuntu-latest)	5m 53s
test_18 / test (20.x, windows-latest)	5m 16s
test_host / test (18.x, windows-latest)	2m 15s
test_20 / test (20.x, windows-latest)	4m 33s
test_host / test (18.x, macos-latest)	1m 10s
test_20 / test (20.x, macos-latest)	3m 7s
test_18 / test (20.x, macos-latest)	2m 57s
test_host / test (20.x, ubuntu-latest)	5m 42s
test_host / test (20.x, windows-latest)	3m 6s
test_host / test (20.x, macos-latest)	1m 20s
	1h 11m 31s

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