brew: fix get-installer error on fresh macos #193

Job	Run time
fresh-macos-test	3m 19s
homebrew-macos-test-and-lint	9m 5s
homebrew-macos-test	2m 57s
distro-test (ubuntu:latest)	1m 41s
distro-test (fedora:latest)	2m 37s
distro-test (debian:latest)	1m 27s
distro-test (alpine:latest)	1m 34s
distro-test (manjarolinux/base)	2m 4s
distro-test (opensuse/leap)	5m 31s
distro-test (opensuse/tumbleweed)	1m 44s
distro-test (kalilinux/kali-rolling)	1m 44s
distro-test (voidlinux/voidlinux)	1m 59s
	35m 42s

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