KeyPathKit 1.6.0

Update compatible with Swift 5

KeyPathKit 1.5.0

• Implement pattern matching with predicates

KeyPathKit 1.4.0

• Modernize API by using by: label instead of of: to match more closely with Swift stdlib
• Use reduce(into:) for better performances
  Enhance or and and to immediatly return on the first element that doesn't match the expression requirement – it has the benefits to make it work with infinite sequence
• Add a specialized version of distinct() that works with Hashable elements in order to use a Set – it should make the contains lookup faster
• Enhance filter to immediatly return on the first element that doesn't match the expression requirement
• Pull NSPredicate init out of filter closure in order to init it only once
• Leverage Swift 4.0 new "subscript with default value" Dictionary API (SE-0165)
• Use stdlib min(by:) and max(by:) methods instead of a custom reduce()