Add ClassMap@getRawPsrViolations()

[cosmastech]

Motivation

I'd like to build a step in our gitlab pipeline that confirms that all files meet the PSR-4 namespace standard.

How it can be solved now

• Use reflection to extract the $psrViolations from ClassMap, or
• Attempt to parse the strings from the warnings returned from ClassMap@getPsrViolations()

Changes

Adds a method to get the raw violations (ClassMap@getRawPsrViolations()) and add tests.

[Seldaek]

You should be able to use composer dump-autoload --strict-psr --optimize to achieve this - instead of having to script some custom code using this lib.

But that said, I don't see why it shouldn't be possible, so I guess I'm fine merging this. Thanks