Dev do not pass nondirs to psalm #123
                
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When analyzing a dir
src/, phpmetrics does not detectcomposer.json(which is ok, since the file is in the directory above,src/../.However, phpmetrics can be easily fooled to take composer.json into account, by specifying it in
analyzeDirs- which is not clean, but it works (WORKAROUND - as mentioned later in this comment).But when you do that, psalm fails, because it blindly takes everything which is not a dir into its own configuration.
This PR fixes psalm to make the workaround described above possible.
It's a clean fix, regardless of that fact that the workaround is a hack, because the generated psalm xml config is semantically correct with this patch applied:
<directory ...are indeed directories.