Add bashate to CI

[markparonyan]

ref #411

[markparonyan]

@yegor256 Quoting bashate -i E006,E003 "$(find . -name '*.sh')" passes all the filenames as one argument, which is not what bashate expects. But our shellcheck requires it. Should we # shellcheck disable=SC2046?

[yegor256]

@markparonyan you should put all names into an array and then use the array as "${files[@]}", see https://www.shellcheck.net/wiki/SC2046

Just imagine, what will happen if you do this bashate -i E006,E003 $(find . -name '*.sh') and one of the files has this name: a b c d.sh

[markparonyan]

@yegor256 Thanks! I fixed that. Should I also refactor bash scripts across the project according to bashate?
Also what are the issue with this two ci jobs: make / make and make / make-macos? I see them failing in every PR. How can I fix it, so system will allow merging?

[yegor256]

@markparonyan yes, of course you have to fix all bashate warnings before we can merge. Other issues -- make a different ticket about them, we'll see what we can do.

[markparonyan]

@yegor256 please check

[yegor256]

@markparonyan thanks a lot!