[Swift 5.1] Adopt std lib diffing?

[jessesquires]

Ordered Collection Diffing:
https://github.com/apple/swift-evolution/blob/master/proposals/0240-ordered-collection-diffing.md

This should land in Swift 5.1. Can we use this instead of a third-party dependency?

[anayini]

Woah

[anayini]

If we decided to do this I would be down to try implementing :)