Missing interpolation of MARKETING_VERSION in a few places

[evictor]

I randomly saw the var substitution/str interpolation template in a few places when using the latest binary, alerter_v004_darwin_amd64.zip:

Finder "Info", Version metadata

Invoking cli without args

I didn't actually go looking for this, so it's possible there are other places where this var needs to be subbed.

[section83]

Thanks. Yes, Alerter was my first attempt to bundle someone else's code using Xcode. There is a lot to learn e.g. getting all the environment variables correct. As long as Alerter works in all versions of macOS from 10.13 on, I'm happy to wait and fix the issue in the future.

I bundled my own build of Alerter because version 4 doesn't work in High Sierra (at least on my old Mac Mini).

Cheers.