Tests

Fix #148: accept Path in :out, :err and :in #348

Job	Run time
test-ubuntu-graalvm-native	1m 54s
test-ubuntu-temurin@8	18s
test-macOS-temurin@8	48s
test-windows-temurin@8	38s
test-ubuntu-graalvm-community-native	1m 25s
test-macOS-graalvm-native	2m 15s
test-ubuntu-temurin@11	16s
test-macOS-graalvm-community-native	3m 22s
test-macOS-temurin@11	41s
test-windows-graalvm-native	3m 24s
test-windows-temurin@11	1m 0s
test-windows-graalvm-community-native	2m 7s
test-ubuntu-temurin@17	20s
test-macOS-temurin@17	41s
test-windows-temurin@17	59s
	20m 8s

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