Not counting use statements

[patrickkusebauch]

Closes #569

[patrickkusebauch]

My bad, stale cache. 🤦

[dbrumann]

Just a few minor things.

[smoench]

@patrickkusebauch thanks for contributing so much to deptrac.

Here my 2 cents to this PR. I think not counting use statements are a good idea. But I'm not really happy about the implementation. Putting the configuration through every layer down to FileReferenceBuilder should have been an indicator. The result of the AstRunner can be cached and depending when deptrac was executed and when the option was set we might get an different reporting. My proposal would move up to https://github.com/qossmic/deptrac/blob/main/src/DependencyEmitter/BasicDependencyEmitter.php or https://github.com/qossmic/deptrac/blob/main/src/RulesetEngine.php.