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Sébastien Stormacq
e786f2f620
Add a hard coded version number to the user agent string, for an eventual identification by the Lambda service ### Motivation: It's [an issue](https://github.com/swift-server/swift-aws-lambda-runtime/issues/108) that was open more than 5 years ago and was never addressed. At the time, the consensus was to pickup a version number for the Package.swift file and the maintainer at the time decided to wait for Swift to implement this. Five years later, and several major version of Swift later, this is still not available. I decided to move on and implement a less optimal solution. This can be replaced in the future if package version ever becomes part of Package.swift. ### Modifications: Add a version enum to isolate the versioning in one place. I decided to keep it simple and not over engineering it with major, minor, patch and pre-release. At the time, it's a simple string. This is all what we need for usage in the user agent string. ### Result: User agent now identifies as `Swift-Lambda/2,0` instead of `Swift-Lambda/unknown`