Update concurrent code to Async/Await

Swift 5.5 introduced a new concurrency framework with multiple tools and APIs. First we should evaluate the possibility to migrate the current project to the new APIs.

would be good to start reading about Actors in swift . :D i'm in with it :)

Swifter seems to be updating to Async in their version 2.0. This is a good opportunity also to check which dependencies are updating to this approach.

All services are now migrated to concurrency