What are the new collection types introduced in the latest versions of Swift?

In recent versions of Swift, new collection types have been added and existing ones improved:

• OrderedSet — a collection that stores unique elements in the order they were added, combining properties of arrays and sets.
• OrderedDictionary — a dictionary that preserves the order of key insertion.
• Improvements in standard collections, such as more efficient methods and extensions.

Example of using OrderedSet:

import Collections

var orderedSet = OrderedSet<Int>()
orderedSet.append(3)
orderedSet.append(1)
orderedSet.append(3) // will not be added, as the element already exists
print(orderedSet) // [3, 1]