Feature request: suppress "unused global" linter warning on a per-global basis
I was getting a bunch of false-positive "unused global" warnings from the linter in my cart, and after some investigation I figured out that the uses of these variables are all inside functions using the  `_ENV` trick. In hindsight, I totally understand why it wouldn't be able to detect these usages; it has no idea whether a call to `foo()` inside these functions resolves to some local `foo()` in the environment at runtime, or to the global `foo()`.

I see that the shrinko8 docs anticipated this problem, if I'd read them more carefully:

> If you have false positives in your cart due to globals being used via _ENV, you can disable this check just for globals via --no-lint-unused-global.

However, this would disable *all* unused-global warnings, several of which are (in my case) totally valid and helpful. It would be great if the tool had a way to suppress this warning for specific globals, rather than disabling the warning entirely. I'd prefer to mark them up in code with a special comment, but a list passed on the command line would work as well in a pinch.