Release 1.1.0

Changelog:

• Fixed OptionalResult not being a sealed interface.
• Added ResultCollector for turning a List<Result<T, E>> into a Result<List<T>, List<E>>.
• Added ResultCombiner for combining multiple results into a new result.
• Added OptionalResult support for both the ResultCollector and ResultCombiner

Full Changelog: v1.0.0...v1.1.0