Check how hard make hooks sh POSIX compatible

[MaxymVlasov]

will help: https://github.com/dylanaraps/pure-sh-bible and #339 (comment)

Related issues that will not exist if make hooks POSIX compatible: https://github.com/antonbabenko/pre-commit-terraform/issues?q=is%3Aissue+sort%3Aupdated-desc+label%3Aarea%2FmacOS+

[yermulnik]

Okay.... https://mywiki.wooledge.org/BashPitfalls =)

[antonbabenko]

[MaxymVlasov]

Depends on #303

[MaxymVlasov]

@yermulnik Then, I suppose we can close this issue and stick with bash 3.2.57?

https://github.com/antonbabenko/pre-commit-terraform/pull/620/files#r1485091544

[yermulnik]

@MaxymVlasov I guess we indeed can and, if we explicitly rely upon bash in shebang strings, care only about cross-compatibility between Bash v3 and more modern versions of Bash.