Support Ktor 3.0.0

[philip-segerfast]

Ktor 3.0.0 was just released and it would be a great time to make rsocket-kotlin support it.

Motivation

I need to use both RSocket and SSE in my client app but Ktor SSE client is only supported on Ktor 3.0.0 which rsocket-kotlin doesn't support yet, so an update would be great.

[whyoleg]

Hey!
Yeah, great news about ktor... Not so great about work required to migrate :)

I will merge active PRs and start working on migration to kotlinx-io and ktor 3.0 in coming weeks.
I'm pretty busy with other things right now, so I don't have expected release date.

[philip-segerfast]

Of course!
Thanks a lot for your response and your dedication to this library 🙏 It rocks!
Take all the time that is needed.