Search for used names in PHPDoc comments

[ruudk]

This depends on https://github.com/TomasVotruba/class-leak/pull/36

Fixes #35

Only the last 2 commits in this PR are new.

Rename attributes to usedAttributes

This better explains that it's about used attributes.

Search for used names in comments

By using PHPStan's PHPDoc parser, we can scan referenced types inside PHPDocs.

Next to testing all the components separately, we introduce a functional CheckCommandTest that runs the check command. Doing it this way, we make sure that everything works together.

This also allows us to add more complex test cases too.

[ruudk]

@TomasVotruba @samsonasik This one is ready for review, what do you think 😊 ?

[ruudk]

@TomasVotruba You're probably busy, but are there any things you want me to change to move this PR forward?

[ruudk]

@TomasVotruba Now that https://github.com/TomasVotruba/class-leak/pull/39 is merged instead of https://github.com/TomasVotruba/class-leak/pull/36, this PR is out of sync. But before I fix it up again, I'd like to hear your thoughts if you want to merge this at all 😊

[TomasVotruba]

Same here, I got lost in the amount of changes for the feature. Could you submit smaller PRs with very narrow focus on the feature you want to deliver? That way I can read & merge :+1: Otherwise there is a risk I'll skip it and it will stale.

On the docblock topic, I think I'd prefer to keep this package simple and require at least 1 native PHP usage. The docblock themselves are not reliable, as string-only. Project can mark 100 classes used in docblock, but none of them ever used in the code.

That's why I want to stick with native PHP only and not add docblock. Thanks for understanding :+1: