Test `copyfile`

Test `copyfile` #90

Job	Run time
Test `copyfile` (ubuntu-latest, R2020b)	1m 30s
Test `copyfile` (ubuntu-latest, R2021a)	1m 25s
Test `copyfile` (ubuntu-latest, R2022a)	1m 22s
Test `copyfile` (ubuntu-latest, R2023a)	1m 52s
Test `copyfile` (ubuntu-latest, R2023b)	1m 28s
Test `copyfile` (ubuntu-latest, latest)	1m 35s
Test `copyfile` (ubuntu-20.04, R2020b)	3m 3s
Test `copyfile` (ubuntu-20.04, R2021a)	2m 17s
Test `copyfile` (ubuntu-20.04, R2022a)	1m 38s
Test `copyfile` (ubuntu-20.04, R2023a)	1m 38s
Test `copyfile` (ubuntu-20.04, R2023b)	1m 21s
Test `copyfile` (ubuntu-20.04, latest)	1m 40s
Test `copyfile` (macos-11, R2020b)	4m 22s
Test `copyfile` (macos-11, R2021a)	4m 23s
Test `copyfile` (macos-11, R2022a)	5m 40s
Test `copyfile` (macos-11, R2023a)	5m 24s
Test `copyfile` (macos-latest, R2020b)	3m 49s
Test `copyfile` (macos-latest, R2021a)	2m 18s
Test `copyfile` (macos-latest, R2022a)	2m 26s
Test `copyfile` (macos-latest, R2023a)	3m 34s
Test `copyfile` (macos-13, R2020b)	2m 57s
Test `copyfile` (macos-13, R2021a)	1m 55s
Test `copyfile` (macos-13, R2022a)	3m 0s
Test `copyfile` (macos-13, R2023a)	2m 55s
	1h 3m 32s

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