Bump tar from 0.4.38 to 0.4.39 #580

Job	Run time
test-juliaup (x86_64-pc-windows-msvc)	7m 21s
test-juliaup (x86_64-pc-windows-gnu)	10m 21s
test-juliaup (x86_64-apple-darwin)	8m 5s
test-juliaup (x86_64-unknown-linux-gnu)	5m 0s
test-juliaup (x86_64-unknown-linux-musl)	7m 10s
test-juliaup (i686-pc-windows-msvc)	10m 26s
test-juliaup (i686-pc-windows-gnu)	13m 59s
check-juliaup (x86_64-pc-windows-msvc-windowsstore)	2m 17s
check-juliaup (x86_64-pc-windows-msvc-windowsappinstaller)	2m 23s
check-juliaup (x86_64-pc-windows-gnu-msi)	2m 27s
check-juliaup (x86_64-pc-windows-gnu-msi)	6m 56s
check-juliaup (x86_64-apple-darwin)	2m 14s
check-juliaup (x86_64-unknown-linux-gnu)	3m 9s
check-juliaup (x86_64-unknown-linux-musl)	2m 53s
check-juliaup (i686-pc-windows-msvc-windowsstore)	2m 36s
check-juliaup (i686-pc-windows-msvc-windowsappinstaller)	3m 4s
check-juliaup (i686-pc-windows-gnu-msi)	3m 4s
check-juliaup (i686-unknown-linux-gnu)	2m 34s
check-juliaup (i686-unknown-linux-musl)	2m 56s
check-juliaup (aarch64-unknown-linux-gnu)	2m 32s
check-juliaup (aarch64-unknown-linux-musl)	2m 56s
check-juliaup (aarch64-apple-darwin)	2m 27s
	1h 46m 50s

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