use echo-wait instead of sponge #192

Job	Run time
homebrew-macos-test	4m 47s
fresh-macos-test	5m 59s
homebrew-macos-test-and-lint	11m 47s
distro-test (ubuntu:latest)	1m 55s
distro-test (fedora:latest)	2m 48s
distro-test (debian:latest)	1m 33s
distro-test (alpine:latest)	1m 35s
distro-test (manjarolinux/base)	2m 3s
distro-test (opensuse/leap)	4m 29s
distro-test (opensuse/tumbleweed)	1m 50s
distro-test (kalilinux/kali-rolling)	1m 49s
distro-test (voidlinux/voidlinux)	1m 44s
	42m 19s

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