Update/swift 5

[DanielStormApps]

Summary

• Update for Swift 5 and Xcode 10.2 support

Notes

• The new Hashable updates are outside my comfort zone. There may be a better way to satisfy the new requirements.
  • Seems to me the new hash(into:) is a replacement for hashValue: https://developer.apple.com/documentation/swift/hashable/2995575-hash

[kean]

Thanks you, @DanielStormApps! I reviewed your changes and made a couple of comments.

Also .travis.yml needs an update.

[DanielStormApps]

Thanks you, @DanielStormApps! I reviewed your changes and made a couple of comments.

Also .travis.yml needs an update.

Updated. Not sure if I applied the changes you had intended. Seems the builds are failing except for 10.2 environments.

[kean]

Thank you for addressing the comments. I will review and merge this on the weekend. If there are any remaining issues, I'm will address them. Thanks again, @DanielStormApps!

[kean]

@DanielStormApps merged this plus merged the changes to remove per-platform targets. So now instead of Nuke iOS, Nuke macOS, etc targets we have a single target. No duplication.