onlyMatch

[oreporan]

Feature request description

The opposite of ignoreMatch (since from what I see ignore match isn't working with regex, I can't put ^)
in our monorepo I would like to use depcheck but only for our internal packages (not 3rd party libraries).
All of our packages have the same scope @some-internal-scope and I'd like depcheck to only look for these.
This is needed to running lerna run test on affect packages and their dependencies.

Code snippets (if applicable)

How the dependency is used (if applicable):

 onlyMatch: [ // only show dependencies that match these globs
    '@internal-scope'
  ],

Any extra info

I can make a PR if this is accepted