Test `copyfile`

Test `copyfile` #56

Job	Run time
Test `copyfile` (ubuntu-latest, R2020b)	1m 20s
Test `copyfile` (ubuntu-latest, R2021a)	1m 14s
Test `copyfile` (ubuntu-latest, R2022a)	1m 27s
Test `copyfile` (ubuntu-latest, R2023a)	1m 31s
Test `copyfile` (ubuntu-latest, R2023b)	1m 18s
Test `copyfile` (ubuntu-latest, latest)	1m 33s
Test `copyfile` (ubuntu-20.04, R2020b)	1m 57s
Test `copyfile` (ubuntu-20.04, R2021a)	1m 22s
Test `copyfile` (ubuntu-20.04, R2022a)	1m 21s
Test `copyfile` (ubuntu-20.04, R2023a)	1m 34s
Test `copyfile` (ubuntu-20.04, R2023b)	1m 19s
Test `copyfile` (ubuntu-20.04, latest)	1m 14s
Test `copyfile` (macos-11, R2020b)	5m 35s
Test `copyfile` (macos-11, R2021a)	4m 46s
Test `copyfile` (macos-11, R2022a)	6m 0s
Test `copyfile` (macos-11, R2023a)	5m 9s
Test `copyfile` (macos-latest, R2020b)	6m 29s
Test `copyfile` (macos-latest, R2021a)	1m 55s
Test `copyfile` (macos-latest, R2022a)	4m 46s
Test `copyfile` (macos-latest, R2023a)	4m 12s
Test `copyfile` (macos-13, R2020b)	3m 17s
Test `copyfile` (macos-13, R2021a)	2m 57s
Test `copyfile` (macos-13, R2022a)	2m 35s
Test `copyfile` (macos-13, R2023a)	2m 17s
	1h 7m 8s

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