add future.strict_environment config option

[ITProKyle]

Why This Is Needed

resolves #333

What Changed

Added

• option for how to handle environments being defined but the current environment not in the definition

Changed

• log format of skip information no longer includes extra characters and is now prefixed by the module name

[ITProKyle]

macOS failure is likely on GitHub's end, there arn't any logs that that show a fault.

[troyready]

Everything generally looks great to me here.

I think it'd be good to settle on static vs strict in the config & method names, i.e. picking one for consistency (strict seems good to me fwiw)

[ITProKyle]

not sure where static came from... looks like it only got into the docs/docstring though. i'll swap it out.