Bug Fixes

onionArchitecture() no longer loses ignored dependencies, if the description is changed afterwards (see #623; thanks a lot to @thmuch)

Enhancements

added support for JDK 18 (see #625; thanks a lot to @hankem)
new method JavaCodeUnit.getTypeParameters(). Also the bounds of these type parameters have been added to JavaClass.directDependencies{From/To}Self (see #616; thanks a lot to @hankem for extensive reviews)
JavaMethod now knows its generic return type (retrievable via JavaMethod.getReturnType()). Furthermore type arguments of generic method return types are now part of the JavaClass.directDependencies{From/To}Self (see #616; thanks a lot to @hankem for extensive reviews)