Release 1.3.0 & TCP port numbering

[jbelkins]

Today, we released AWS SDK for Swift v1.3.0. https://github.com/awslabs/aws-sdk-swift/releases/tag/1.3.0

This release contains a breaking API change that may require code changes in your consuming code. Specifically, the type for the port property (i.e. for TCP port number) has been changed from Int16 to UInt16 on the URI, Endpoint, and HTTPRequest types, plus their associated builder types, due to the fact that Int16 cannot represent port numbers above 32767. If you set your own TCP port numbers on these types, you may have to adjust your code to assign a UInt16 value.

We expect that very few customers will be affected, but nevertheless we apologize for the breaking change. Feel free to reply below if you need assistance updating your code to accommodate this release.