9.6.0

• ReferenceList::addNewReference(), Statement::addNewReference() and the StatementList constructor
  supported being called with a variadic argument list, with a single array argument,
  or (in the case of StatementList) with a single Traversable argument.
  The latter two forms are now deprecated (though they still work);
  please update your code:
  for instance, change ->addNewReference( [ $x, $y ] ) to ->addNewReference( $x, $y ),
  and ->addNewReference( $snaks ) to ->addNewReference( ...$snaks ).
• Statement, Reference, SnakList and Snak no longer implement the Hashable and Immutable interfaces from DataValues/DataValues.
• Removed usages of the Comparable interface
• Made the library installable together with DataValues 3.x