fs-own: bash v3 compat and tests #194

Job	Run time
homebrew-macos-test	3m 29s
homebrew-macos-test-and-lint	9m 17s
fresh-macos-test	4m 11s
distro-test (ubuntu:latest)	1m 58s
distro-test (fedora:latest)	2m 17s
distro-test (debian:latest)	1m 52s
distro-test (alpine:latest)	1m 38s
distro-test (manjarolinux/base)	1m 49s
distro-test (opensuse/leap)	4m 39s
distro-test (opensuse/tumbleweed)	1m 47s
distro-test (kalilinux/kali-rolling)	1m 44s
distro-test (voidlinux/voidlinux)	1m 54s
	36m 35s

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