Resolve "Copy assignments to new edition"

Closes #121 (closed)

src/main/java/nl/tudelft/submit/dto/create/VersionCreateDTO.java

@@ -56,4 +56,9 @@ public class VersionCreateDTO extends Create<Version> {
 		return Version.class;
 	}
 
+	@Override
+	protected void postApply(Version data) {
+		super.postApply(data);
+		data.setAssignmentId(assignment.getId());
+	}
 }