v0.6.0

• render constructor methods & roles more UML2 compliant
• support static factory methods (returning self or static (PHP8))
• render implementations and extensions as relations
• option added to skip relations to types that were not analyzed (resolves #6)
• resolve name conflicts when rendering classlikes without namespaces (resolves #20)
• service & renderer refactoring (resolves #15)
• simplified namespace toggles (classes, interfaces and traits use the same flag now)
• do not render PlantUML namespace separator when classes are not rendered with namespaces