Update server tutorial codebase, fixes #333

[tib]

This pull request aims to fix the server tutorial sample code.
Sample snippets updated to use Swift 5.9 and Swift OpenAPI generator tools 0.3.0+

[czechboy0]

This is great, @tib, thank you!

Would you be open to also updating the other 2 tutorials, to keep all 3 in sync?

[czechboy0]

@swift-server-bot add to allowlist

[tib]

This is great, @tib, thank you!

Would you be open to also updating the other 2 tutorials, to keep all 3 in sync?

Yes, of course I can do that, do you want me to open separate PRs or alter this one?

[czechboy0]

This is great, @tib, thank you!
Would you be open to also updating the other 2 tutorials, to keep all 3 in sync?

Yes, of course I can do that, do you want me to open separate PRs or alter this one?

You can do it in this one.

[czechboy0]

Ok with https://github.com/apple/swift-openapi-runtime/releases/tag/0.3.4 released, please see if you can simplify the example and it actually works for you :)

[tib]

Ok with https://github.com/apple/swift-openapi-runtime/releases/tag/0.3.4 released, please see if you can simplify the example and it actually works for you :)

let emoji = String(emojis.randomElement()!)
return .ok(.init(body: .plainText(.init(emoji))))

I already changed that. 😉