Filter before resolving with filing-cabinet?

Hello - I'm curious if you'd be interested in a proposal to support filtering _before_ resolving with file-cabinet. What I'm trying to accomplish is to prevent certain dependencies from being considered at all so that I can fail fast when something can't be resolved. Currently, the `filter` option filters _after_ dependencies have been extracted and resolved, and there's no way to filter these before they're added to the `nonExistent` array. If it were possible to filter before resolution, I could prevent these dependencies from being considered at all. I can't easily post-process `nonExistent` because I need to know from which file the dependencies were from. So, I'm thinking if the filtering functionality were augmented to support filtering pre-resolution, I could just hook into that.

If this sounds interesting, I can work on a PR. I imagine we can't just move the `filter` function call before the file cabinet call since that would be a breaking change, but could maybe add an additional config or similar? Thanks!