Release 6.6.0 #291

Job	Run time
build (18.x, windows-latest)	1m 27s
build (18.x, ubuntu-latest)	35s
build (20.x, macos-latest)	20s
test_host / test (18.x, ubuntu-latest)	5m 56s
test_host / test (18.x, macos-latest)	48s
test_host / test (20.x, macos-latest)	1m 22s
build (20.x, ubuntu-latest)	25s
build (18.x, macos-latest)	23s
test_host / test (20.x, ubuntu-latest)	5m 44s
test_18 / test (18.x, ubuntu-latest)	3m 11s
test_18 / test (20.x, ubuntu-latest)	2m 54s
test_host / test (18.x, windows-latest)	1m 54s
test_host / test (20.x, windows-latest)	3m 54s
test_18 / test (18.x, windows-latest)	4m 44s
test_20 / test (18.x, ubuntu-latest)	3m 9s
test_20 / test (20.x, ubuntu-latest)	2m 51s
test_20 / test (20.x, windows-latest)	4m 38s
test_20 / test (18.x, macos-latest)	3m 59s
test_18 / test (20.x, macos-latest)	3m 46s
test_18 / test (20.x, windows-latest)	4m 40s
test_18 / test (18.x, macos-latest)	3m 4s
test_20 / test (20.x, macos-latest)	3m 5s
build (20.x, windows-latest)	1m 29s
test_20 / test (18.x, windows-latest)	4m 33s
	1h 8m 51s

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